iphone 5s sim to 6s any worries?

Discussion in 'iPhone' started by Zombiecrowd, Sep 24, 2015.

  1. Zombiecrowd, Sep 24, 2015
    Last edited: Sep 24, 2015

    Zombiecrowd macrumors regular

    Oct 3, 2013
    To keep my unlimited data I am doing the forever method basically transferring my upgrade on UDP line to a 2GB line and activating the new 6s on that line. I was going to switch sim cards after that to get my UDP line on the new 6s.

    But I read in a few places if I keep my sim from my current 5s and put it in the new 6s I cannot take advantage of the new LTE speeds. I thought the new upgrades were part of the modem upgrade in the phones and had nothing to do with the sim card.

    Can anyone confirm that keeping my 5s sim and putting it in the new 6s phone is 100% OK and not a downgrade in speed? Verizon if this matters
  2. ldpm14 macrumors 6502


    Sep 16, 2014
    Southlake, Texas
    I can confirm that it will work. The iPhone 5s and the 6s both use the nano sim card. Just make sure you update the new phones IMEI/ESN with your carrier.
  3. Lobwedgephil macrumors 68040


    Apr 7, 2012
    Just switch sims before you power on and you will be fine.
  4. Cergman macrumors 6502a


    Jan 1, 2013
    my tesla
    I don't think you get HD Voice with the old SIMs tho. When I moved my sim from my 5s (from my 5) to my 6, AT&T notified me that I needed a new sim for HD Voice.
  5. Zombiecrowd thread starter macrumors regular

    Oct 3, 2013

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