New T-Mobile iPhone 6 Plus. I've made a few calls today, but I can't seem to text or call my son's cell phone. He's on a recently IOS updated Verizon 5. I've sent him texts, they appear to send, but he doesn't get them. If I call, phone doesn't dial, just instant busy signal, doesn't ring or connect to voicemail. He can call me just fine. I'm assuming since my phone is new today, it must be something in my settings. If anyone has any ideas I'd appreciate it. I've been searching all over, can't find anything similar.