They do support facetime over cellular, although in store the customer service agents didn't know what the problem is. They instructed me to call customer support, which I have not yet
I started this thread since I've been all over the internet and haven't seen this specific issue brought up anywhere... I'll re-post once I get a chance to try T-Mobile's tech support.
-cda:
I just found this on T-Mobile's iphone 5 support website
To set up FaceTime, follow these steps:
- From the Home screen, tap Settings.
- Tap FaceTime.
- Tap Add an Email
- Enter your email address.
- Tap Next.
- You are returned to the Home screen and FaceTime is ready to use.
This is probably going to work, I had my Apple ID configured, but there was no email address associated with facetime yet...
Message was edited by: corndogankles