There was once HSPA+. And now LTE. While T-Mobile is now heavily adveritising "Bring your own phone" service, it is so lacking in providing the spec the customers need to know when purchasing an unlocked phone. I've googled it so many times, but I NEVER got a straight answer.
1. In terms of Band Number, Which LTE Band does T-Mobile Support? There are upward 23 bands or even more. Which one is it?
2. In terms of Frequency, which LTE Frequency is it? 1700, 1900, 2100, none of the above, or all of the above?
T-Mobile NEEDS to spell out the spec requirements for phones the customers are going to bring in to its network. It's that simple!