1. AC Question's Avatar
    Hello, I have a Galaxy J7 from boost, I have the unlock code and MLS code. I sold it to my brother who is trying to use it on AT&T. When he inserts their sim, it says invalid sim.
    07-22-2016 06:47 PM
  2. goku_vegeta's Avatar
    Hello, I have a Galaxy J7 from boost, I have the unlock code and MLS code. I sold it to my brother who is trying to use it on AT&T. When he inserts their sim, it says invalid sim.
    Hello!

    Is the SIM currently active? If you were to put that same SIM in a different phone, would it connect to the network and make a call successfully?
    07-22-2016 09:22 PM

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