Imessage may be faulty
Hello Apple community, i am fairly new with the Iphone myself as i recently recieved a second hand Iphone 4. So lets cut to the point, i have made an IMessage account and set it all up ready to go. Turned it on, set the Send & recieve so everything is fine. The thing is, when i am connected to a network source (wifi) supposedly imessage would work. Wrong. For some odd reason, when i go into messages and want to message a friend, or even my own siblings with imessage who yes own an Iphone with ios 5 or above the speech bubble is green instead of blue. On rare occassions, i have noticed imessage will only work if someone imessages me. I cannot start a conversation with imessage, any advice?
iPhone 4, iOS 6.0.1