I have a factory unlocked Iphone 4s.
Earlier today, I called Tmobile Tech Support for settings to enable MMS. The instructions they emailed me are at the end of this email.
Bottom line is that when I followed the instructions, yes, the MMS worked, but the normal text messaging (SMS) stopped working! In order to get SMS to start working, I had to turn "MMS Messaging" to off.
Here's what Tmobile sent me, and again, my Iphone is factory unlocked but not jailbroken, so I can't go the Cydia route:
Any help appreciated.
Verify MMS is enabled:
Then powercycle your device and test it.
I know it doesn't help to fix one thing and have another stop working. although T-Mobile does not guarantee full functionality of non T-Mobile devices, we should be able to get both SMS and MMS working. Please check out Problems SMS/MMS with Unlocked iphone 4S for steps on how to reset your SMS service center number.
Let me know if this helps!
Try this: http://support.t-mobile.com/thread/17918?tstart=0
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