Hope someone can help me out here.. Been facing this weird issue for the past 4 days. I own an iphone 4 and 5 with iOS 6.0.1 and due to some reason i deactivated my imessages the other day and since then i'm not able to register it again with my itunes ID keeps giving me the password error. Following are some of the steps i did in trying to solve this issue but nothing worked. 1. Reset my password for itunes ID 2. Erase all contents and settings from the phones and configure imessage again. 3. date and time set to automatic. 4. use a different ID on my iphones. But no luck. I know for sure that my Itunes ID is working as i've got a macbook pro and imessages configured on that with the same ID... I tried signing in from my ipod and works there aswell... A friend of mine signed in using his ID on my iphone and his ID is working on my phone..