Here is something people have been talking about for some time now, and most have been stating NOT to buy the T-Mobile version of the OnePlus 6T.  I beg to differ, video at the break.

Use this link to buy the OnePlus 6T, and $20 credit to buy yourself a case for your new phone.  https://www.oneplus.com/invite#MZHZ9M1XA6YMJG