I recently switched to an S4 mini from and iPhone 4s. I group text regularly with 3 coworkers (all three are using iPhones with 1 on Verizon 1 on sprint and 1 on ATT). I always receive the texts from the Verizon and Sprint users but never get the texts from the ATT user when texting in the group setting. With that said, I can text normally with the ATT user without a problem when it is just the two of us. He has deleted my contacted and re-added me, he has changed the "send as sms" in the messages section of his setting on his iPhone. Any idea what is the issue?
