Originally Posted by
mr_nobody I'm stock/rooted, no rom. Definitely don't have that checkbox. Could it be carrier driven?
Hey mr_nobody, sonicresidue, et al.:
I had this same issue of a non-visible "group MMS" option. I found the solution on another forum (wish I could remember and give credit where it's due, xda maybe?):
1) Check your sim card's phone number by going to your phone's settings>about phone>status>my phone number. Do you see it?
2) If you don't see it, then call t-mobile customer service. Explain to them that you can't see your phone number on the sim card via phone settings. This is the same problem that happened to me. I told them that I needed it for my MMS settings. My customer rep was able to help me reset the sim card. She directed me to power down my device, eject the sim card, confirm the # on the sim card, reset their settings, and then had me reboot the phone. It worked!
I hope this helps you guys.