Firmware 7.54.2.A1 Release Notes

Abbreviation/Acronym	Definitions
AMSS	AMSS firmware
AvMS	AirVantage Management Services FOTA
BIP	Bearer Independent Protocol
BOOT	Boot loader
DCE	Data Circuit Equipment
DTE	Data Terminal Equipment
DTMF	Dual-tone multi-frequency signaling
DTR	Data Terminal Ready
eUICC	embedded UICC
GPIO	Global Purpose Input Output
HYPER	Virtualization layer
IMEI	International Mobile Equipment Identity
MDN	Mobile Directory Number
ME	Mobile Equipment
MIN	Mobile Identification Number
MS	Mobile Station
NID	Network Identification
OAT_FW	Open-AT firmware
OAT_NVP	Open-AT firmware NV parameters
PDP	Packet Data Protocol
PLMN	Public Land Mobile Networks
PPP	Point-to-Point Protocol
SID	System Identification
SIM	Subscriber Identity Module
STK	SIM Application Toolkit
TCP	Transmission Control Protocol
UART	Universal Asynchronous Receiver Transmitter
UDP	User Datagram Protocol

3. Related Documentation

Table 2. Related Documentation

Ref. #	Doc. #	Rev.	Document Title
[R-1]	4111843	Rev17.0	AT Commands Interface Guide for Firmware 7.54.0.A1
[R-2]	4111844	Rev16.0	ADL User Guide for Open AT Application Framework OS 6.54.0.A1
[R-3]	4115145	Rev15.1	AirPrime - SL808xT,SL808xBT,SL808xBTA - Product Technical Specification & Customer Design Guidelines
[R-4]	2174049	Rev10	Audio feature Application Note
[R-5]	4119150	Rev1.0	Customer Release Notes – OS 6.54.3.A1

4. Compatibility

Table 3. Hardware Compatibility

AirPrime Compatibility List
AirPrime SL8080T/BT/BTA, SL8082T/BT/BTA, SL8084T/BT/BTA.

Table 4. Software Compatibility

Component	Version
Open AT OS	6.54.3.A1.201609080909
Location Library	1.4.8.201509231354
eCall inband Modem Library	1.3.4.201512300930
Security Library	2.2.4.201610061056
Internet Library	5.58.3.A1.201610210959
Extended AT Application	3.2.0.A1.201610211044

5. Software Release Description

5.1. Release Identification

Table 5. Open AT Firmware Release Information

	Modem (ATI8)	Services (ATI3)
Identification	"MODEM 3G+","Revision: C04.05.26.00.SL8RDAP R2853 CNSHZ-ED-XP0031 2016/12/29 19: 47:06"	R7.54.2.A1.201701061226.sl808xA
Date of generation	2016/12/29 19:47:06	2017/01/06 12:26
Binary Size		2023972 bytes
Checksum		0x3f5d7cf8
Boot loader X-modem	"DWL"," C04.05.26.00.SL8RDBT R2853 CNSHZ-ED-XP0031 2016/12/29 19:47:06","","Sier ra Wireless",0,"","00000000","00000000"
IMEI SV	28
Flash/RAM type	NAND 128 MBytes / RAM 64 Mbytes

5.2. Software Tools Versions

Table 6. Software Tools Information

S/W Tools Name	Version	Resource file
Binary Update Tool	R11.2.1105.0	SIERRA_BOOT_C04.05.26.00.SL8RD.cwe SIERRA_OAT_FW_754_2_A1_7_FULL_sl808xA.cwe
Developer Studio	3.3
MuxConfTool	4.5.6.0

5.3. Released Files and Download Processes

Table 8. Released Files for Firmware Upgrade

Download Option	Files
Upgrade through Developer Studio	Open_AT_Application_Framework_v2-54-2-A1_SL808x_Full_Installer.exe

Upgrade through Binary Update Tool	Bootloader	SIERRA_BOOT_C04.05.26.00.SL8RD.cwe
Upgrade through Binary Update Tool	Firmware	SIERRA_OAT_FW_754_2_A1_7_FULL_sl808xA.cwe
Upgrade through X-modem	Bootloader	SIERRA_BOOT_C04.05.26.00.SL8RD.dwl
Upgrade through X-modem	Firmware	SIERRA_OAT_FW_754_2_A1_7_FULL_sl808xA.dwl

Note: R7.54.2.A1.201701061226.SL808xA_7.exe can be used to recover “AirPrime SL808xT/BT/BTA” in bad state.

The Firmware .cwe and .dwl contain the operators name latest TS.25 list (formerly, SE.13) dated April 4, 2016

For the upgrade procedure, you can refer to:

· In-line help for upgrade procedure through Developer Studio

· The upgrade procedure through X-modem

Warning: Firmware upgrade from 7.50, 7.52 is not supported.

6. Software Changes Description

6.1. Corrections/Improvements

Table 7. Corrections/Improvements

ID	Description	Impacted Domain	Impacted Sub-Domain	Fixed in
8789	AirPrime performs silent retries for an eCall indefinitely in case there is no response from the network (e.g.- very poor signal strength). Until the eCall succeeds, ATH will not be functional.	AT	Audio	7.54.2.A1
6310	GSM CSD auto answer setting using ATS0 does not work when AT+CGAUTO is set to 0	AT	Audio	7.54.2.A1
719	Incorrect +CGEV indication is received when detach process initiated on the Airprime.	AT	Other	7.54.2.A1
643	When AT+WREGC=1 is issued, the Airprime is in spy mode but the unsolicited +CREG: 2 indication indicating the new registration status i.e. not registered on network may not be received sometimes, instead +CREG: 1,5 is received which means Airprime is still registered to the network.	AT	Other	7.54.2.A1
8811	If AT+WREGC=1 or AT+WREGC=0 command is issued after AT+CFUN=4 then port is blocked and no command can be issued further.	AT	Other	7.54.2.A1
6536	GPRS dialup cannot be created on a CDC ACM2 port	AT	Other	7.54.2.A1
6558	Command +CNUM could return +CME ERROR: 3 with very rare SIM/USIM card. In this case AT+CPBS="ON" command also does not work.	AT	Phonebook	7.54.2.A1
6530	Name of more than 16 characters can't be written in "ON" phonebook using UCS2 characters	AT	Phonebook	7.54.2.A1
685	Airprime can sometimes fail to send SMS when a data call is in progress.	AT	SMS	7.54.2.A1
6585	When a PDP connection is attempted with an incorrect/not network-accepted APN, it returns +CME ERROR: 3 (instead of +CME ERROR: 133/533). If the AMS APN is set but doesn't work, Airprime will return +CME ERROR: 3 and will not try to use the customer APNs from CGDCONT.	AVMS	Other	7.54.2.A1
8750	Airprime may sometimes reset when opening/closing USB port in loop, using +WMFM command	DEVICE	USB	7.54.2.A1
8788	Firmware does not read the flash objects correctly at initialization leading to loss of flash object data by the application.	FLASH	Other	7.54.2.A1
8791	On rare occasions, GPIO initialization may be unsuccessful and can lead to GPIO subscription failure.	GPIO	Service, Pin	7.54.2.A1
12900	AirPrime does not update and apply NITZ time when class is set to CG (GPRS only).	GPRS	Other	7.54.2.A1
644	Airprime may sometimes fail in getting the aiding data (e,g. EED) from HTTP server even after issuing the commands to trigger the download process.	GPS	Xtra	7.54.2.A1
8733	During active voice call, if +VTS command is issued while AT+CMGD=0,4 is in progress, then result of +VTS command is not received.	GSM	Other	7.54.2.A1
8607	If a SIM card has conflicting SIM PIN settings (PIN verification is enable but usage qualifier is set to 0) AT+CPIN? may show incorrect status.	SIM	Other	7.54.2.A1
746	Airprime reset can sometimes occur for some specific IOT sim cards as customer will not receive !STKC (it’s AMSS URC)	SIM	STK	7.54.2.A1
740	The Airprime could not register on network after it enters SPY mode and camps on the forbidden PLMN cell, then it does not respond in the NO service after exiting the SPY mode	SYS	Other	7.54.2.A1
6556	Airprime reset may occur when UART over SPI port is closed using AT+WMFM command when HAPC mode is enabled on it.	UART	UART	7.54.2.A1
8817	AirPrime may sometimes reset when UART is opened & closed repeatedly using Open UART APIs.	UART	UART	7.54.2.A1
6496	If a voice call is in progress and another incoming call is disconnected by the peer without having been accepted, then first call audio gets muted.	Voice	Audio	7.54.2.A1
697	When a voice call is released by the network, the following call returns the error code +CEER 16 even if it's disconnected for no signal.	AT	CALL	7.54.1.A1
8785	AirPrime performs silent retries of eCall indefinitely in case there is no response from the network (eg- very poor signal strength) for an eCall. Until the eCall succeeds, ATH will not be functional.	AT	CALL	7.54.1.A1
8710	Response for AT+CIND? Command is not received if it is issued after AT+CFUN=4.	AT	OTHER	7.54.1.A1
6422	The firmware default format of +COPS command is changed from numeric to long alphanumeric.	AT	OTHER	7.54.1.A1
6400	In case of AT+CFUN=1, Time was reinitialized in AMSS by OAT FW. So before Time is retrieved from Network it is not exact, like for a cold start.	AT	OTHER	7.54.1.A1
8684	Sometimes closing port can lead to Airprime reset when there are pending responses to be sent over that port.	AT	OTHER	7.54.1.A1
8662	<SignalLevel> reported by +WPOW deviates from actual signal level due to incorrect calculation in the firmware.	AT	OTHER	7.54.1.A1
8766	AT+CFBACKUP command fails if there is a residual error file (remains of corrupted NV files) and reports error 684	AT	OTHER	7.54.1.A1
8706	Supplementary service commands stop working if six or more than six unsolicited +CUSD: 0,xxx indications are received from AMS.	AT	SS	7.54.1.A1
605	RX is mute when the DTMF is on.	AUDIO	DTMF	7.54.1.A1
6388	Airprime cannot detect SIM card if it is PH-NET PIN enabled.			7.54.1.A1
6456	Facility lock status cannot be queried till the facility lock password is provided using AT+CPIN	SIM		7.54.1.A1
8678	Action Command at+wsimpfset returns +CME ERROR: 740 (for specific SIMs) -> SIM switch profile may be indicated as failed.	SIM		7.54.1.A1
6406	Incorrect of IMEISV length defined by Qualcomm in QSC6270 PL4.5. Fix the incorrect IMEISV in Provide Local information of STK proactive command on SL808X module.	SIM		7.54.1.A1
6407	AT+CNUM return ERROR after OTA SIM Provisioning.	SIM	STK	7.54.1.A1
6333	When memory in SIM/USIM is full and ME memory is not full, MS is no more able to receive MTSMS class 2 as no more free memory to store it. MS is supposed to send appropriate ERROR code to the network to allow it to suspend next MTSMS class 2 deliveries. But error code sent by MS is wrong in such a use case	SMS	MT SMS	7.54.1.A1
6442	Class 2 SMS received before +WIND: 16 does not send any +CMTI indication but are silently stored in SIM card.	SMS	MT SMS	7.54.1.A1
6444	Application cannot read SMS even if +CMTI indication is sent, if it is received after SMSPP service has been loaded but before SMSCB service is loaded.	SMS	MT SMS	7.54.1.A1
6365	When performing ATD#xxxx, Airprime rejects the MO call, when it should treat it.	AT	CALL	7.54.0.A1
5888	AT+CHLD=1x result in all calls drop if "x" is not a valid call	AT	CALL	7.54.0.A1
6385	If EF-OPL entry matching with current LAC and operator points to record 0 in EF-PNN, then PLMN name from NITZ is not displayed as a response to AT+COPS? Command	AT	OTHER	7.54.0.A1
6374	AT+CLCK="PN" can cause side effect, and bad PLMN lock	AT	OTHER	7.54.0.A1
8601	AT+WUBS? Read command may return incorrect value if the AirPrime is not able to latch to the band selected by AT+WUBS action command.	AT	OTHER	7.54.0.A1
8615	At times, response for AT+CREG? Command is +CREG: 1 even after removing SIM card.	AT	OTHER	7.54.0.A1
8586	+CGREG status shown by AT command is not in line with actual GPRS registration status of Airprime.	AT	OTHER	7.54.0.A1
8619	Response of AT+CIEV for receives signal quality is not in line with response received for AT+CSQ	AT	OTHER	7.54.0.A1
8620	Unsolicited +CIEV indication is not received when signal strength changes and +CIEV codes are enabled using AT+CMER command.	AT	OTHER	7.54.0.A1
8327	Even if main cell information are available, +CME ERROR 30 is sometimes returned when AT+CCED=0,35 is issued	AT	OTHER	7.54.0.A1
5813	The maximum supported value for ADC Vbatt with AT+WDIAG is 4.3V instead of 4.2V	AT	OTHER	7.54.0.A1
5937	+WIOM AT command usage may lead to Airprime reset if numerously sent ( more than 30000 times)	AT	GPIO	7.54.0.A1
5948	No +CGREG indication is sent after GPRS service recovery.	AT	OTHER	7.54.0.A1
5996	Wrong Error code is obtained for +CEER when the GPRS attach request is rejected for the cause "GPRS not allowed"	AT	OTHER	7.54.0.A1
8525	When Flash objects storage is intensively used (for example for Phonebook), Application may be frozen during few seconds after switching radio on with AT+CFUN=1,0.	AT	OTHER	7.54.0.A1
544	Airprime might reset or not respond (occurrence < 10%) when sending AT+CCED	AT	OTHER	7.54.0.A1
8568	If some badly formed AT commands are sent by application, it could end with a heap memory corruption	AT	OTHER	7.54.0.A1
8638	Incorrect error code reported by AT+CEER when network rejects PDP context activation request	AT	OTHER	7.54.0.A1
8542	Very low CPU available during a few seconds after AT+CFUN=0	AT	OTHER	7.54.0.A1
524	When 8 wires UART is configured with WHCNF and AT+W32K=1 commands, Airprime can’t go into sleep mode due to bad DTR signal.	AT	Sleep Mode	7.54.0.A1
579	The Airprime can't enter into sleep mode after hang up a call	AT	Sleep Mode	7.54.0.A1
9669	When a SMS sending is requested by using AT+CMGS, the AT parser is blocked waiting for the OK response. In case of huge load in the system (other treatment in progress etc ...), the AT+CMGS treatment may take a long time.	AT	SMS	7.54.0.A1
556	Multiple instances of AT command timeouts seen usually when there is an MT SMS at the same time	AT	SMS	7.54.0.A1
5497	MS is unable to display the information by AT command for Open Channel as channel identifier is not reported on the AT interface. (BIP feature)	AT	STK	7.54.0.A1
4266	The audio PCM playback stop may lead to Airprime reset.	AUDIO		7.54.0.A1
5388	Hardware PCM interface is not functional (with restrictions AGC, and AVC should be cut)	AUDIO		7.54.0.A1
5647	Rx / Tx AGC are active as default settings	AUDIO		7.54.0.A1
8458	When a second MO call is done after releasing a first call with ATH, the echo canceller doesn't work, unless voice prompt without audio processing is used during call establishment and RxAGC is activated. Sending "AT+ECHO=1,1" prior to each call works around this issue.	AUDIO		7.54.0.A1
8657	Any use of audio in Application can stop sleep mode activation.	AUDIO		7.54.0.A1
494/5782	After a Firmware update, Airprime may not be able to reconnect automatically to AMS, due to an HTTP error received (<7%). After Airprime reset, connection is successful.	AvMS		7.54.0.A1
5968	AirPrime does connect to the AMS after AT+WDSS=1,1 command is issued in case of an AvMS package is present in flash and end user has not yet accepted the installation of the package (User agreement enable).	AvMS		7.54.0.A1
9651	ICCID Monitoring not supported with AMS	AvMS	Monitoring	7.54.0.A1
480	GPIO state is not stable when Airprime is set in Low Power Mode.	DEVICE	GPIO	7.54.0.A1
8571	USB CDC EEM link cannot receive data after restart of bearer from sleep mode.	DEVICE	USB	7.54.0.A1
8397	SPI read starts failing continuously after stress testing this interface for 2 days at low speed.	DEVICE	SPI	7.54.0.A1
8478	An SPI transaction may fail under SPI stress test	DEVICE	SPI	7.54.0.A1
8498	Sometimes, the Airprime resets with watchdog after subscribing and then reading/writing to the SPI bus.	DEVICE	SPI	7.54.0.A1
8504	SPI transaction may be sometimes incomplete.	DEVICE	SPI	7.54.0.A1
8609	Reset of Airprime in some particular cases of UART_SPI usage (heavy traffic and IOCTL for example)	DEVICE	UART SPI	7.54.0.A1
8564	Reset seen sometimes during boot up when traces are being collected using UART over SPI port.	DEVICE	UART SPI	7.54.0.A1
6199	UART over SPI does not work and data transfer is not possible, because of Bad Chip Select management	DEVICE	UART SPI	7.54.0.A1
8647	stops sending data sent using adl_fcmSendData () from Application to external application using UART over SPI when HAPC mode is enabled and data is sent at a very high rate, along with unsolicited AT responses	DEVICE	UART SPI	7.54.0.A1
8502	According to internal conditions (not easy to get), data received on UART are no more managed, so the AT interface seems frozen or AT answers are delayed. It happens especially in case or Break or Overrun.	DEVICE	UART	7.54.0.A1
6032	The UART is blocked if there is a FIFO overrun	DEVICE	UART	7.54.0.A1
8464	[eUICC] Local ERA-GLONASS subscription swap procedure fails with a specific Oberthur eUICC card.	SIM	eUICC	7.54.0.A1
6149	Stack Corruption occurs on receiving sim toolkit refresh indication. It can leadsto a reset.	SIM	STK	7.54.0.A1
6383	Memory leak occurs if STLK auto response is enabled and silent mode is disabled. After too many leaks, it leads to a reset.	SIM	STK	7.54.0.A1
8630	software watchdog Reset are got after SIM phonebook activity	SIM	PHBK	7.54.0.A1
6240	Value of RP Cause in CP_DATA [RP_ERROR] is wrong when a MT SMS to be stored in SIM is received. That means network receives a wrong indication from the MS when the SIM memory is full. Depending on the way the network uses this information, it could lead the network to take wrong decision about potential SMS retransmission (trying to resend by changing class for example etc ...).	SMS		7.54.0.A1
6389	SMS Sent by AirPrime using STK SEND SMS command has invalid SMSC	SMS		7.54.0.A1
6336	When "out of envelops" exception happens, a double fault can also happen, so analysis will be very difficult	SYS		7.54.0.A1
8550	Users cannot download DEE, after sending username and password with AT+WPPP and activating the PDP context.	TELECOM	DATA	7.54.0.A1
8529	Connected data connection is not disconnected even GSM stack has already been shut down due to overheat.	TELECOM	DATA	7.54.0.A1
691	DNS parameters in Activate PDP Context Request is not correct of SL8 and cause the DNS not returned by network.	TELECOM	DATA	7.54.0.A1
409	Cannot establish multiple PDP connections with the same APN.	TELECOM	SESSION MGT	7.54.0.A1
6178	Cannot establish multiple PDP connections if PDP context type are different (IP and PPP)	TELECOM	SESSION MGT	7.54.0.A1
6313	APN used for CGDCONT always truncated to 25 characters	TELECOM	SESSION MGT	7.54.0.A1
8675	If a SIM REFRESH is initiated by SIM card during a PDP context establishment (AT+CGACT=1,x), final answer (OK) may be not displayed on AT terminal. No way no treat other AT commands.	TELECOM	SESSION MGT	7.54.0.A1
516	Airprime resets when roaming between AT&T and Canadian networks along the border using the Jasper SIM	TELECOM		7.54.0.A1
8677	3G band selection with at+wubs command is not taken into effect sometimes.	TELECOM		7.54.0.A1
8540	Very low CPU available for Application in case of disconnection of USB when used in debug (connected to Dev Studio)	TRC	HAPC	7.54.0.A1

6.2. Interface Changes

This section presents the interfaces that have been modified since Firmware 7.54.0.A1.

Table 8. Interface Changes in 7.54.2.A1

Command	Comment
SERIAL_STATE	Serial state notifications SERIAL_STATE with DCD/DCR On/Off added on dialup creation on FOMA port
+WHCNF	Added parameter to enable only USB Full speed support in the firmware.

Table 9. Interface Changes in 7.54.0.A1

Command	Comment
+COPS	Default value for <format> has been changed from 2 (numeric <oper>) to 0 (long alphanumeric format <oper>)

7. Troubleshooting

For Open AT Developers, please refer to the Troubleshooting Guide available in source website before contacting customer support.

For AT developers, please contact customer service for support and debugging information.

8. Certification Description

Product	GCF-CC	NAPRD.03
AirPrime SL8080T/BT/BTA - Sierra Wireless	N/A	7.54.2.A1 release Modem: C04.05.26.00 NAPRD.03 v5.30 Date of Certification: 2017-03-15
AirPrime SL8082T/BT/BTA - Sierra Wireless	7.54.2.A1 release Modem: C04.05.26.00 GCF-CC v3.61.1 Date of Certification: 2017-03-15	N/A
AirPrime SL8084T/BT/BTA - Sierra Wireless	7.54.2.A1 release Modem: C04.05.26.00 GCF-CC v3.61.1 Date of Certification: 2017-03-15	N/A

9. Restrictions and Additional Information

This section presents additional information or restrictions that must be taken into account regarding Firmware 7.54.2.A1. Issues are sorted by alphabetical order of Impacted Domain

Table 10. Restrictions and Additional Information

Issue ID	Description (What/When)	Impacted Domain	Impacted Sub-Domain
8784	ATH may sometimes not work on Airprime after atd112#64 call is made	AT	Audio
6054	AT+CBST=7,0,3 returns OK instead of returning ERROR as <ce>=3 is not supported.	AT	CSD
6063	Airprime becomes unresponsive if AT+DS? is executed before entering the SIM PIN when SIM PIN is enabled	AT	CSD
6285	With AT+CGLA, APDU command longer than 235 bytes are not supported (+CME ERROR occurs) and APDU response longer than 243 bytes are not supported too.	AT	eUICC
5949	Memory leak occurs when AT+WIOM?, AT+WIOM=2 and AT+WIOM=3 commands are issued	AT	GPIO
8192	+GPSEVERROR: -23,4 appears after AT+GPSSTART	AT	GPS
12936	Sometimes Firmware patch installation might fail on Airprime even if DOTA3 feature is enabled.	AT	Other
12745	With a corrupted Application running, command ATI9 can cause Airprime reset.	AT	Other
12098	Wrong RTC time in microseconds may be displayed when adl_rtcGetTime() is used to get and display time.	AT	Other
11989	When OFFWHENUNPLUG feature is enabled and allocate any external interrupt to trigger the Airprime power off, then changing the state of external interrupt doesn't power off Airprime	AT	Other
11988	A command is sent and an unsolicited response (+CREG: 2) is returned before the OK response. Normally the unsolicited response have to be returned after.	AT	Other
11931	When the speed of serial link is set to a speed lower than 9600, speed displayed into the CONNECT response is still 9600 instead of the data call connection rate.	AT	Other
11928	When combination of concatenated commands and single command are given very quickly from an application on Airprime, the response could be in an incorrect order.	AT	Other
2355	AT+WLCK doesn’t work for PS, PP and PC facilities.	AT	Other
11909	Airprime may give incorrect status in +WIND 10 indication for phonebook record change	AT	Phonebook
2835	SIM initialization time can be very long and may vary from one SIM to other.	AT	SIM
5669	Call Forwarding command is not correctly managed for Data services (CSD).	AT	SS
5853	+CHLD=2 handling occasionally returns +CME ERROR 30	AT	SS
5967	CHLD Making a 5-party conference call, ATD variants return NO CARRIER	AT	SS
5970	AT+CHLD=1 may lead to no response after answering an incoming call and doing an outgoing call. That means releasing all active calls (if any exist) and accepts the other (held or waiting) call during a multiparty call session may not work	AT	SS
5852	Airprime returns +CME ERROR 30 for +CHLD=2X. That means: placing all active calls on hold except call X during a multiparty call session does not work. Airprime returns +CME ERROR 30 for +CHLD=3. That means: adding a held call to conversation during a multiparty call session does not work.	AT	SS
5026	Incorrect terminal response is sent to the SIM after a proactive Send USSD command is requested.	AT	STK
5031	Incorrect terminal response is sent to the SIM after a proactive Send SS command is requested.	AT	STK
6243	Little glitch at the end of DTMF playback	AUDIO	DTMF
8411	Audio prompt glitch during hand overs	AUDIO	Other
8413	Audio prompt glitch during call alerting time	AUDIO	Other
11994	When there is already opened flow after making a CSD call, then it is not possible to open an fcm flow.	DATA	Other
5848	Aux ADC1 value returned by AT+ADC for numeric mode is wrong. The analog mode is working.	DEVICE	ADC
5820	The terminating flag (0xF9) is not received for CMUX DISC command when UART baud rate is configured to 9600bps or 19200bps.	DEVICE	CMUX
6035	UART over SPI: missing characters in transmission and reception during throughput tests.	DEVICE	UART over SPI
11926	When a protocol like CMUX or WMUX is activated and the WRIM pulseRi mode is set, the physical RI signal of the physical UART interface may not pulse out	DEVICE	V24
11985	An update package is composed of several dwl files that will be installed by the update agent. A CRC check is done by the update agent before installing the update package. So if the update package has been corrupted after its creation, it won't be installed. But if one of the dwl file used at the update package creation has a bad content (not a real dwl file, corrupted dwl file...), the update agent will not detect the bad file before beginning the installation. That-is to-say that some dwl files can be installed before detecting the bad content.	DWL	Other
12234	If user agreement for install has been set, then user is asked for agreement to install ( +WDSI: 3) even after package download has been a failure.	Embedded, RDMS	RDMS
11939	When the Airprime is not registered to the network and application accepts to download the update package from AMS using +WDSR command, Airprime returns OK instead of +CME ERROR: 651.	Embedded, RDMS	RDMS
11935	Command "AT+WDSS=1,1" could return "+CME ERROR: 652" instead of "+CME ERROR: 3" or "+CME: ERROR:133" when invalid APN is given.	Embedded, RDMS	RDMS
11924	Monitoring Airprime on AMS could show network coverage increases when Airprime is in limited services (emergency) or full services (register on a network).	Embedded, RDMS	RDMS
11905	When a power off is made and the protocol stack is hot reset using AT+CFUN=1,0, the Airprime can register to the network but sometimes connection to the AMS may not be available.	Embedded, RDMS	RDMS
11903	Using AMS, a parameter can be configured to send an alert to AMS when a specific value is reached. If the triggered value is reached but the Airprime is not registered on the network, the alert will be sent when Airprime is registered again. However in this case the reported value could be current one i.e. the last updated value (if the parameter value was changed between the moment triggered was reached and the report).	Embedded, RDMS	RDMS
5241	"." and ".." folders are not shown while listing the contents of a File System.	File system	Other
11936	On Airprime if two cell ID's are used repeatedly to perform various A&D related operations, then various operations on these cell ID's might result in errors.	FLASH	DOTA
11916	Performing A&D related operations on Airprime when re-compaction is done after deleting a cell can result in error, even if the Cell ID exists and attempt is made to read it.	FLASH	DOTA
12187	Airprime won't perform GPRS attach procedure when leaving spy mode even If Airprime is manually attached before entering spy mode.	GPRS	Other
12970	Sometimes, AT+CGACT command does not respond with an OK or ERROR, leading to inability to get WIP_BEV_IP_CONNECTED or WIP_BEV_CONN_FAILED event.	GPRS	Session
12921	AirPrime reset with watchdog when browsing internet (using EEM or dialup) when network provides good bandwidth.	GPRS	Session
11947	Call index in the +WIND: 5,x and +WIND: 6,x may be incorrectly equal to 2 even if +WIND: 6,1 response has been received for the first call and the call has been disconnected. This may happen when the second call is made before receiving the CC_REL_IND for first call.	GSM	CC
12056	There could be a problem to synchronize on a cell when radio environment is noisy.	GSM	CELL_SEL
12094	+CREG: 5 indication may not come if we issue the command "AT+CREG=1" once a roaming SIM is registered to the network.	GSM	Other
8754	During active voice call, if +VTS command is issued while AT+CMGD=0,4 is in progress, then result of +VTS command may not be received occasionally.	GSM	Other
12305	"POP" noise is much reduced and no distortion anymore in PCM_8kS_16bit play after reset	HWL	Audio
12131	Need external reset and Increase in the DSP reset time and time settling if the problematic DSP initialization still exists.	HWL	Modem
12130	In some specific customer applications where the JTAG pins are non-connected, Airprime very rarely cannot start properly, keep on resetting and eventually go to the download recovery mode. A power off is needed to exit this state and restart properly.	HWL	Modem
12911	AT+CGACT command may lead to Airprime reset if password entered is empty while using CHAP protocol which is configured using AT+WPPP	MMT	Other
12753	Playing a sequence of DTMF tones on voice call Tx using adl_DTMFPlayExt() leads to playback of only the first DTMF and that too twice on the receiving side and all the other DTMFs are not played.	OTHER	OAT
12918	Airprime reset can occur if flash objects used by MMT layer are corrupted.	OTHER	Other
12198	In some cases the application tries to print the semaphore errors repeatedly, Which may cause the Airprime to reset.	OTHER	Other
12146	CTS of the Airprime goes low when hardware flow control on UART is disabled. An external hardware may not be able to communicate to the Airprime over UART if it has hardware flow control enabled.	OTHER	Other
11934	Airprime reset can occur with the activation of OSA on removing the remote SIM before +WIND: 4 indication. The reset is because of releasing the SIMRspData buffer which was not allocated due to SIM removal.	OTHER	Other
11933	After OSA service subscription with adl_osaSubscribe() function, if application try to unsubscribe to the OSA service without to post back ATR request to the Firmware (after an ADL_OSA_EVENT_ATR_REQUEST or ADL_OSA_EVENT_ADPU_REQUEST event) then un-subscription can fail. OSA service is now not closed and it shall not be possible to subscribe again to it.	OTHER	Other
12274	If memory is corrupted by RTK, then Airprime could be in AT Mode but the application may still not start	RTK	MEM_MGT
3127	SIM Initialization time on Airprime could be sometimes longer (WIND4: 43 sec)	SIM
5575	[eUICC] Local ERA-GLONASS subscription swap procedure may be long (5 seconds) with specific eUICC.	SIM	eUICC
12048	Few SIM may not be detected on Airprime and could not be used	SIM	Other
11944	When SIM removal feature is deactivated and open the Sim rack to wait for +CME ERROR:13, then the AT+CFUN=0 command may not be answered.	SIM	Other
8798	If a SIM card has conflicting SIM PIN settings (PIN verification is enable but usage qualifier is set to 0) AT+CPIN? may show incorrect status.	SIM	Other
12708	Switching to GLONASS Profile is not successful with some UICC operators when voice or packet session is in progress.	SIM	Other
4963	STK proactive command "Language notification" is not supported.	SIM	STK
6012	No terminal response is sent to the SIM for GET INKEY, backward move.	SIM	STK
2303	When a STK SEND SS is requested, the action is correctly done, but the Terminal response sent back to the SIM doesn't contain additional information (Operation Code and SS Parameters).	SIM	STK
4197	Incorrect TERMINAL RESPONSE is received if call attempt resulting from a proactive command fails.	SIM	STK
6445	SMS indication for class 2 may be lost if module is reset before +WIND: 16 indication	SMS	MT SMS
6332	When ME and SM memory are full regarding to SMS storage and a SMS is deleted by user in ME memory, the "memory available procedure" is not performed. Depending on the network strategy, MTSMS may be blocked in network up to SMS SM deletion.	SMS	MT SMS
5550	Empty SMS in text and PDU mode can’t be sent (+CMS ERROR: 513)	SMS	Other
8272	Incoming SMS may be never received in case Airprime is in OFF mode state when SMS is sent.	SMS	Other
8138	When sending SMS (PDU mode) continuously without any delay, SMS delivery reports are not noticed through +CDS.	SMS	Other
12781	Airprime may sometimes reset with exception in case of stack overflow	SYS	Other

Firmware 7.54.2.A1 Release Notes

1. Introduction

1.1. Document Scope

1.2. Document Audience

1.3. New Features/Enhancements

2. Abbreviations and Definitions