My girlfriend and I both updated to iOS 5 on our various devices and we're having trouble with iMessages. I have an iPad and an iPhone, she only has an iPhone. GF's phone Thread A - girlfriend's message thread with boyfriend's cell phone number Thread B - girlfriend's iMessage thread BF's phone Thread C - boyfriend's unified message thread (iMessage + SMS from gf's phone) I used my iPad to send her the first few iMessages. I understand why that would be in a separate thread - the message is linked to my email instead of my apple id. I then sent her a text from my phone. That appeared in Thread A, as it should have because it was a regular SMS (I was trying to make it switch over). I was confused, so I asked her to reply to the iMessage. I received that reply as an iMessage in Thread C, the same thread as all of my SMSs. I then got switched over to iMessage. I sent her a few iMessages and they were all delivered to Thread B on my girlfriend's phone. I checked the settings on my phone and I saw that the "Caller ID" in messages was set to my phone number, not my email. What I'm confused about is why the messages + iMessages are appearing in a unified thread for me but in two separate threads for her. Any help would be greatly appreciated. She would both like to continue using the same message thread and would not have to deal with two separate threads each time we use the service.