1. faith3935's Avatar
    Hello. I currently own and use a Lumia 640 AT&T variant that is GSM as my daily driver and I am interested in trying out T-Mobile so I can get unlimited data and 7GB worth of tethering so I am wondering is are you able to use T-Mobile Wi-Fi Hotspot on the AT&T version of the Lumia 640?
    09-06-2015 09:32 PM
  2. Zachary Boddy's Avatar
    If my memory is sufficient, the Lumia 640 has a full universal GSM radio, meaning it'll work with the same performance on T-Mobile as on AT&T (although where you are will still likely change things) so you shouldn't have any issues. However, wait for a second opinion, as I'm not 100%.
    libra89 and faith3935 like this.
    09-06-2015 10:26 PM
  3. azlkk's Avatar
    I could never get my unlocked AT&T L920 mobile hotspot to work on T-Mobile. It worked fine out of the country on other carriers though.
    09-08-2015 04:28 AM
  4. j0sh_m's Avatar
    Tethering works great on my unlocked AT&T 640 with T-mobile.

    Sent from my iPhone using Tapatalk
    09-21-2015 08:32 PM
  5. onysi's Avatar
    Its not going to work. Tried it.
    09-25-2015 10:09 PM

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