The only reason I wanted to switch to T-mobile last year was to utilize promotion that was going on around November 2017 (Buy 2 iPhone X and get $700 in rebate). I clearly mentioned to person I spoke with that I don't want to purchase iPhone X and will wait till next iPhone is launched in September. Person assured me that you would be able to use whatever promotion is going on around that time on you existing line without adding a new line (since I switched from ATT to T-mobile and on newly added lines I am not using promotion). He said you can safely switch to T-Mobile right now and you would be able to use promotion when next iPhone will be launched since T-Mobile will definitely have some kind of promotion during next thanksgiving.
Now when I called them that I want to use current promotion, they are saying I can't use promotion without adding a line. I mean this is ridiculous, why would I add another line. They simply can not honor me what was promised by T-Mobile, at this point I don't have any benefit of switching from ATT to T-mobile.
I would advice stay with your carrier and stay the hell away from T-Mobile as far as possible.
Best answer by tmo_amanda
Thanks for getting back to me,