[Q] T-Mobile Tether topic

I am having trouble getting Wifi Hotspot or any tethering to work with my new Padfone X on the T-Mobile Network.

Everytime I try to enable it I get the error message:
There is a temporary network problem that prevents the enabling of this service. Please retry later.

I read the phone might block it since it uses AT&T software but I am unsure what setting to change to fix this.
My phone is rooted and hope someone can help me with this issue.