AT&T iPhone4 SIM to iPhone5

Discussion in 'iPhone Tips, Help and Troubleshooting' started by RogersDA, Dec 18, 2013.

  1. RogersDA macrumors 6502

    Aug 19, 2009
    I have an iPhone 4 with AT&T for many years now. I am thinking of buying an unlocked iPhone 5s , mostly because the home button on the iPhone 4 is not responding well.

    Can I just get the unlocked phone from Apple and use the SIM from my iPhone 4? That is, will phone service just continue when the iPhone 5 gets the older SIM or would I need to contact AT&T and start a new plan/change the existing plan?

    Will an unlocked iPhone 5s be useable with Verizon or AT&T (with the appropriate SIM I guess)?

  2. PsstGreek macrumors 68040


    Oct 21, 2010
    Tampa Bay
    You would need a Nano-Sim.

    A factory unlocked iPhone will not work with Verizon. It will only work with a GSM carrier. However a Verizon iPhone 5/5S (unlocked for GSM) will work with an AT&T/T-Mobile sim.

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