Recently we have trade in our old mobile and added new line to the existing group using a promotion offer, they have promised overall 500 trade credit for old mobile and adding new line as per the promotion. Unfortunately T Mobile is not good enough keep their word and simply saying promotion is not eligible and just saying some reasons which were never discussed at the time of opening line or during last 4 months, simply bargaining to give some credit which is much lesser than actual trade in amount.
Honestly I had worst experience with T-Mobile and they are saying after so much of research they have found out the reason is due to port in from previous carrier to T-Mobile, looks like T-mobile do not even know what they are selling, instead simply escape and do not stand on promises given at the time of purchases. Simply, T Mobile is luring customers with false promotions which cannot be applied to customer after couple of months.