My friend and I bought iPads more or less same time but from different shops. Hers was IOS 5. Something and mine was 4.something. Hers had the Message App already installed and mine didn't. Then I got the tech guy at the shop to update my software and then the Message App appeared. Green square with white "speech bubble". It's a great instant messaging like text on a cellphone. When I got it home the app was still there but didn't work! Next day I went to a coffee shop with wifi and it worked there! Didn't work when I got home! A couple days later suddenly worked at home for no rhyme or reason and then the next day stopped working. Haven't got it working since. Have spoken to my ISP and several other "boffins" - nobody can explain it. Help. CherryB.