1st gen iphone using other ATT SIM

Discussion in 'iPhone' started by siliconhybrid, Jul 16, 2008.

  1. siliconhybrid macrumors newbie

    Joined:
    Jul 16, 2008
    #1
    Hello,
    This may have been discussed.
    I am a new member looking to jump into the iphone mania
    I currently have Treo 650 with ATT PDA unlimited data plan. I tried to use my friend's unlocked iphone, and it works (voice and data)

    I have few questions:
    1) Will a locked 1st gen iphone accept my ATT SIM card for voice and data?
    2) Will a locked 3G iphone accept my ATT SIM card for voice and data?
    3) If I get an unlocked 3G iphone (in the future), will the data rate be a 3G or the 2G (or 2.5G) data rate, using my current ATT SIM card?

    The reason I ask these questions is, I do not want to renew my ATT contract. I currently pay $70 for 450 mins, 2 lines, including 1 unlimited data plan.

    Thanks for the answers
     
  2. ubersalad macrumors 6502a

    Joined:
    Feb 26, 2008
    #2
    1G phone will work, but you will need to renew your contract to activate.
     
  3. siliconhybrid thread starter macrumors newbie

    Joined:
    Jul 16, 2008
    #3
    really?
    I mean, few days ago I tried my friend's unlocked iphone, and it worked great without activating it again.

    Does ATT know (detect) if my SIM card is used with iphone or other phone type?

    please enlighten me.
    thank you
     
  4. fenderbass146 macrumors 65816

    fenderbass146

    Joined:
    Mar 11, 2009
    Location:
    Northwest Indiana
  5. 1rottenapple macrumors 65816

    Joined:
    Apr 21, 2004
    #5
    As long as it is unlocked or even jail broken using an at&t sim, then it should work. Just make sure data is activated... I think my sister got charged for using an unlocked iphone and the data kept sending and receiving bytes.
     
  6. DMC-12 macrumors 6502

    DMC-12

    Joined:
    May 16, 2007
    Location:
    Nashville, TN
    #6
    If you don't need a data plan, you can call AT&T and have them disable data on your SIM card. Then once you unlock your iPhone, you will be able to use it like any other phone without unexpected data charges.
     
  7. SkippyThorson macrumors 65816

    SkippyThorson

    Joined:
    Jul 22, 2007
    Location:
    Utica, NY
    #7
    That's exactly it - and you have one of the best usernames on this site. :D
     
  8. DMC-12 macrumors 6502

    DMC-12

    Joined:
    May 16, 2007
    Location:
    Nashville, TN
    #8
    Thanks!
     

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