iPhone 4s No Sim

Discussion in 'iPhone' started by sicdeath, Dec 17, 2014.

  1. sicdeath macrumors member

    Jul 12, 2011
    I have a factory unlocked iPhone 4s which was working perfectly fine until I upgraded to another phone. Now, when I insert my sim into the 4s, its saying no sim or invalid sim. I'm not sure what the problem is but its running ios 7.1 and I want to avoid updating it to ios 8. Any suggestions?
  2. Newtons Apple macrumors P6

    Newtons Apple

    Mar 12, 2014
    Jacksonville, Florida
    Even being unlocked the 4S may not be able to use ANY SIM card.

    What carrier is the SIM card for?

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