Currently Being ModeratedJan 8, 2013 7:46 PM (in response to Sulafa)
Using FaceTime http://support.apple.com/kb/ht4319
Troubleshooting FaceTime http://support.apple.com/kb/TS3367
The Complete Guide to FaceTime + iMessage: Setup, Use, and Troubleshooting
Troubleshooting FaceTime and iMessage activation
iOS: About Messages
Set up iMessage
Setting Up Multiple iOS Devices for iMessage and Facetime
FaceTime and iMessage not accepting Apple ID password
Unable to use FaceTime and iMessage with my apple ID
Currently Being ModeratedAug 18, 2013 9:45 PM (in response to ismailabri)
No I didn't find a solution unfortunately. I had revised all the links that was listed by Tom (Texas Mac Man) but it didn’t work. I ended up creating a new apple ID just for FaceTime! After which it worked fine.
Currently Being ModeratedAug 28, 2013 1:34 PM (in response to Sulafa)
I had the same problem for a long time,i did all the possible solution but didn't work,i noticed that i just need to update the date lol i always change the date because of candy crush and i realized that it's deactivating my facetime automatically for some reason and i was lazy to put the correct date then i realized that it's because of that :D now i can use again my facetime on ipad2.