Carrier Do I need to put my old SIM card in my new 6s Plus?

Discussion in 'iPhone' started by Tubamajuba, Sep 25, 2015.

  1. Tubamajuba macrumors 68020

    Jun 8, 2011
    Or will the pre-installed SIM card work? My 6S Plus is still showing the temporary number under the "Phone" part of the Settings app.
  2. koulmj Suspended


    Mar 18, 2013
    Most likely. I did for my verizon upgrade today.
  3. DoofenshmirtzEI macrumors 6502a


    Mar 1, 2011
    Which carrier? My AT&T phone worked just fine with the pre-installed SIM. Activation went through fast.
  4. Tubamajuba thread starter macrumors 68020

    Jun 8, 2011
    Thanks for the reply.

    T-Mobile. And yeah, the last time I got a new iPhone I didn't have to use my old SIM.
  5. Tubamajuba thread starter macrumors 68020

    Jun 8, 2011
    Figured it out. For anyone that has the same issue-

    Login to your T-Mobile account and go to the "Phone" tab. There should be a section for managing SIM cards- click through and you can enter the ICCID listed under Settings->General->About. That will let T-Mobile know to associate your phone number with the new SIM card. For good measure, I entered my number in the "My Number" section of the phone settings- but I'm thinking that might not be necessary.

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