1. AC Question's Avatar
    when i put my at&t sim card in my verizon galaxy s5 phone
    it keeps saying phone activation sim from unknown source
    04-19-2015 02:43 PM
  2. Raptor007's Avatar
    The issue may be that its SIM locked which is pretty common for Verizon & AT&T to do so you can't jump carriers without paying off the contract first. If its paid off and you are contract free, you should only need to go into the radio settings and tell it to use global settings instead of CDMA/LTE only.

    NETWORK LTE Band 13/4 (700/1700 MHz), CDMA/1xEVDO Rev. A (800/1900 MHz); Global - EDGE/GSM (850/900/1800/1900), HSPA/UMTS(850/900/1900/2100)
    04-23-2015 08:01 PM

Similar Threads

  1. S5 lollipop update failure plus wifi instability
    By MrsSmall in forum Legacy Android & Other OS's
    Replies: 7
    Last Post: 04-20-2015, 10:32 AM
  2. How do I get a Verizon Galaxy S5 with AT&T sim card working?
    By AC Question in forum Samsung Galaxy S5
    Replies: 1
    Last Post: 04-19-2015, 03:07 PM
  3. how to remove a blue tooth device from an LG Optimus phone
    By AC Question in forum Ask a Question
    Replies: 1
    Last Post: 04-19-2015, 03:07 PM
  4. Replies: 1
    Last Post: 04-19-2015, 03:06 PM
  5. what is your favorite way to take a screenshot?
    By robinhelenehebert in forum LG G3
    Replies: 2
    Last Post: 04-19-2015, 02:51 PM