Unlocked Phone Compatibility


    Good Morning,


    My wife and I have the two following unlocked cellphones currently with AT&T sim cards:

    1) Samsung Galaxy A5 2016 (SM-A510F)

    2) Sony Xperia M5 2016 (E5603)


    Actually the devices had been activated with European sim cards in 2016 and besides, they are working perfectly with AT&T sim cards and work with zero problem. Since we don't have good AT&T coverage in where we live, we have decided to move to T-mobile. So, would you please let us know if the devices are compatible with T-mobile, as well?


    Thanks a lot!

      All replies

      • tmo_amanda

        Re: Unlocked Phone Compatibility

        Hey, young.kh!


        The compatibility of the devices depends on the area you'll primarily use them in. What zip code will you mainly use these two phones in?

        • drnewcomb2

          Re: Unlocked Phone Compatibility

          Acording to GSMarena.com, the A510F has only one LTE band used by T-Mobile. Band 5 (850 MHz), which is only used in Myrtle Beach, SC. It has only one UMTS (3G) band used by T-Mobile, band 2, which is not used for UMTS everywhere. It has 2G compatibility with GSM-1900. In some markets (e.g. NYC) this phone would give very poor performance.


          The Sony appears to have essentially identical bands and would perform equally badly.


          Each appear to be phones designed for the European market with little concern for the bands used in North America.

          • young.kh

            Re: Unlocked Phone Compatibility

            Thanks a lot for your kind replies.

            Actually we live in 11801 and since we have modems for internet at home / work, we use the devices mostly as phones and less for internet.


            We hope the provided information helps.


              • drnewcomb2

                Re: Unlocked Phone Compatibility

                If you get a lot of dropped and missed calls in that market, it's because the phones are stuck on a very thin GSM layer. In the entire NYC market, it really helps to have a phone that's fully compatible with all T-Mobile's bands and standards.