samsung galaxy s3

[Android Question]

recently samaung galaxy s3 had an update and now my picture message will not work iy say apn not on device. Myphone is a sprint phone that was flashed to metro pcs

 

[Rukbat]

Bring it in to a MetroPCS store and say, in a nice and polite way, "you broke it, so fix or replace it while I wait". If the APN is no longer accessible, you won't be able to to MMS (and maybe not access the internet at all). That doesn't happen because you pushed the wrong button, but it could happen because their OTA update glitched, and they'll have to take responsibility for that.