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Unlocked Tmobile Invalid SIM

Discussion in 'Android Help' started by Android Question, Feb 3, 2014.

  1. Android Question

    Android Question Guest
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    I recently unlocked my Samsung Galaxy S 3. I moved from T-Mobile to AT&T. Now, whenever I connect to wi-fi to make calls I get this error- Error- ER05 "invalid SIM"
    I have no idea what to do. I would go to the store, but I've had hell with them just trying to figure out how to make my unlocked phone work properly (I figured most of that out on my own). Please HELP!!
     

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    #1 Android Question, Feb 3, 2014
  2. Rukbat

    Rukbat Android Expert
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    Remove the SIM. Disable mobile data. Connect to wifi. Ignore the message.
     
    #2 Rukbat, Feb 3, 2014

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