iMessage and FaceTime not working on iPhone 4 5.1.1

[trilokkanna]

Hi guys, Today i jailbroke and unlocked my iPhone 4 to 5.1.1 but when I tried to send a iMessage it didn't work. So I went to settings and tried to turn it on but every time i switch it on it switches off. When I try to use FaceTime it doesn't work either. So I went into the settings and FaceTime was already on but it still wasn't working. Even my push notifications aren't working. I checked on youtube and I found a way where you have to use a computer to fix it but I don't want to use my computer to fix it, I want to fix it from the iPhone directly. So can you all please try to help me out here.Thanks!!!