In general, prepaid phone users can purchase any kind of unlocked GSM smartphones to access plans offered by either T-Mobile or AT&T. But there are many things to consider, such as frequency bands and other details that may confuse them.…

In general, prepaid phone users can purchase any kind of unlocked GSM smartphones to access plans offered by either T-Mobile or AT&T. But there are many things to consider, such as frequency bands and other details that may confuse them.…