Hi, I upgraded to iOS 5 and iMessage only works on my iPad 1 3G. It doesn't work on my iPad 1 WiFi and my iPod Touch 3GS. I can't send messages. That's all. I read a lot of threads from this forum but I couldn't find any solution. On my iPad 3G it works perfect. Not sure what happen. Also, I noticed that I can't add task with geo on Reminder. This option isn't there on any of my devices. Do you know why?