I went to my local T-Mobile store in Fremont (43813 Pacific Commons Blvd) to buy a nice accessory for the wife using the T-Mobile refer-a-friend promotional cards, and their computer system won't take them! This is a T-Mobile store, but the very helpful people there said unfortunately they could not take them.
What store does take them near Fremont? Why won't their computer system take them? Can you help me?