LTE Standard Module Series
LTE Standard MMS Application Note
LTE_Standard_MMS_Application_Note 21 / 26
4
Error Handling
4.1. Executing MMS AT Commands Fails
When executing MMS AT commands, if response
"ERROR"
is received from the module, please check
whether the (U)SIM card is inserted, and whether it is
+CPIN: READY
returned when executing
AT+CPIN?
.
4.2. PDP Activation Fails
If it is failed to activate a PDP context by
AT+QIACT
command, please check the following configurations:
1. Query whether PS domain is attached or not by
AT+CGATT?
command. If not, please execute
AT+CGATT=1
to attach PS domain.
2. Query the PS domain status by
AT+CGREG?
command and make sure the PS domain has been
registered.
3. Query the PDP context parameters by
AT+QICSGP
command and make sure the APN of specified
PDP context has been set.
4. Make sure the specified PDP context ID is neither used by PPP nor activated by
AT+CGACT
command.
5. According to
3GPP specifications
, the module only supports three PDP contexts activated
simultaneously, so customers must make sure the number of activated PDP contexts is less than 3.
If all above configurations are correct, but activating the PDP context by
AT+QIACT
command still fails,
please reboot the module to resolve this issue. After rebooting the module, please execute the
configurations mentioned above for at least three times and each time at an interval of 10 minutes to
avoid frequently rebooting the module.
4.3. Error Response of AT+QMMSEND
+QMMSEND: <err>,<httprsp>[,<mmsrsp>]
will be returned after executing
AT+QMMSEND
. If
<err>
is
not 0, it indicates that MMS sending failed, and please resend it. If resending is not successful, please
