My wife and I both have iPhones with iOS5 installed (her a 3GS and me a 4). In order to share apps and music, we both use my apple ID. However, when I try to text her phone, it shows text message the whole time. If she tries to text me, she is able to send an iMessage, which I can then respond to. If I try to send to other users that are on iOS5, I am able to send an iMessage. Has anyone seen this problem and found a workaround? I have tried turning iMessage on and off, resetting the phone and nothing changes. Any help would be greatly appreciated.