How to solve picture message not sent
To be able to send or receive an MMS picture text message, an active working mobile data connection is necessary, as the MMS picture messages are sent over the standard phone network, and cannot be sent with a WiFi connection for example.
There are several ways to check that the mobile network connection is properly working, see below or to troubleshoot an MMS picture message not sent.
Power off and check mobile connection
Start by restarting your device, to make sure that the phone has no issue with active applications which could prevent a picture message MMS from being sent out.
Then, when the phone is back up, double check that the mobile data connection is working and has been activated.
In the menu Settings > more > cellular networks, verify that the mobile data option is activated, and that the data roaming option is activated as well, in case you are trying to send an MMS from abroad.
Then, in menu settings > data usage, deactivate the data limit, or change the data limit in case you have a limit setup and it has been reached.
Again, it is necessary to have a working mobile data connection on the Android phone to be able to send MMS picture message, as they are sent through the standard mobile network, and cannot by sent out via WiFi Internet.
Setup an APN access point
It is necessary to have an access point name, also called APN, setup on the phone to be able to send a picture text message.
In order to setup an APN, go to Settings > more > cellular networks > access points names.
There, if there is no access point name selected, setup up one and simply call it internet, with APN setup as internet as well.
That’s all, the APN is setup.
Network provider check and factory reset
When previous solutions did not work and it is still not possible to send a text message, the issue must be checked with the network provider.
Contact your mobile network carrier, and check if there is any reason why you cannot use mobile Internet. Have you reached the spend limit, or maybe it is not allowed to use mobile Internet from another country?
If the mobile internet is properly working, the last option is to perform a phone’s factory reset, by going to Settings > backup and reset > factory data reset.
Proceed carefully, as all data on your Android smartphone will be deleted with this operation.