I hope I posted this in the right section. I'm currently using an unlocked at&t atrix on tmobile. I've noticed when I try to send an mms message to at&t subscribers they get a message saying they cant display the message. When I send a picture to fellow tmobile user they can receive my picture.(haven't tried with other carriers yet) I can however receive mms from anyone regardless the carrier but the pictures are small and blurry.
Is there any fix for this? Custom apn? Any help would be great. Thanks in advance!