If anyone can help me, it would be greatly appreciated. My brother lives in Brazil. I have always been able to text message him with my Iphone with ATT service. Starting 3 months ago, he cannot receive any ATT text messages. I can receive his text messages. We have tried 4 different phones, so I know the phone is not the issue. We have tried calling TIM(his carrier) and ATT. Both were not helpful. Anybody? Thoughts? Thanks.