1. AC Question's Avatar
    when i put my at&t sim card in my verizon galaxy s5 phone it not fully working right and it keeps saying phone activation sim from unknown source
    04-19-2015 02:41 PM
  2. Rukbat's Avatar
    Bring it into Verizon. It may be SIM-locked (it can only take a Verizon SIM - it can be unlocked).
    04-19-2015 03:07 PM

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