Unlocking At&t factory iPhone 6 help
I would like to know if an unlocked iPhone 6 (Model A1549) from At&t will work with T-mobile and if the LTE will work. Also since T-mobile already has the WiFi Calling, will this option become available after the unlock of the At&t iPhone 6 or not? If I go to Settings -> Phone, now it only have the regular options and one that says "At&t Services". There is no WiFi calling option. Will this be available with the unlock?
iPhone 6, iOS 8.1.3, A1549