Troubleshoot problems sending or receiving text messages using T-Mobile's network.
Note: Sending or receiving SMS to or from international short codes is neither supported nor guaranteed. There is no troubleshooting to perform.
To set a limit for threads of text messages (SMS) and picture messages (MMS) to prevent them from getting large, follow these steps:
Can’t get text messages from an iPhone - Apple Support
iOS: Troubleshooting Messages - Apple Support
Text messages show number / letter / symbols instead of text
Text message (SMS) troubleshooting: BlackBerry 10
Text messaging (SMS) troubleshooting: BlackBerry Legacy
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