Just upgraded to Nexus 4 from iphone. My wife has an iphone 5 and we have an ipad. My problem is that I can send messages to her phone, but when she writes back, her messages are going to my old iphone and / or ipad. The sim card was removed from my iphone, trimmed at the Telstra shop and works fine in the Nexus. I know this has nothing to do with the messaging problem. This is probably a really simple thing to fix. But I need help!