I have 2 Jail broken iPhone 3gs on IOS 5 both unlocked with ultrasn0w. One phone the iMessage picks up other IOS 5 iPhones no problem, but my second one, it will not, everything sends as a text message (green send Button/green bubble). I am not sure what is causing this to happen, I have created a icloud account for each device, I have done everything in the settings for imessage, but still cannot get it to work. Under the iMessage on/off switch, it says waiting for activations on both phones. Hopefully I can get a working solutions with out having to re-jailbreak.