How To, AT&T prepaid on unlocked iPhone 4

Discussion in 'iPhone' started by mz100, Dec 22, 2010.

  1. mz100 macrumors regular

    Oct 12, 2010
    Sorry if this has been created, searched a while ago and did not find any related posts.

    I just got done with this entire process, I am using a Prepaid plan on my iPhone 4!
    Background info
    Got phone at 4.01. Used tiny umbrella to update my phone to 4.1 while keeping my baseband on 1.59.00

    Jailbroke phone using greenpois0n, installed ultrasn0w and unlocked phone.

    I knew it was unlocked because i used a trimmed T-Mobile sim and that worked fine for 2 months.

    What I did

    I live in Chicago but go to school in Bloomington, IN, I wanted to order and test a sim to make sure I got service down there and that it would work. I ordered an unactivated go phone AT&T sim off of eBay for $3.
    Trimmed it and popped it into my iPhone 4 and got 5 bars and it read the sim card, because it said "AT&T".

    I got to Chicago, went to AT&T and asked to activate a prepaid Sim card, and told them I don't have the phone with me because it has not come in yet. They activated the sim card and handed it to me. I got home and trimmed it, and unfortunetly cut it too small. Everytime I put it in the iPhone it said no sim. However when I would put my T-Mobile sim in the phone it would give me one bar, indicating that it recognizes a sim card. (I am not sure as to whether or not the Sim from AT&T was not the right size or not working on the iPhone though)

    Luckily I still had the old AT&T sim card from Bloomington with me. So I called AT&T customer support and asked them to transfer my prepaid plan from the New one to my old unactivated sim, I told them it was damaged. I gave them the ICCID of the unactivated old sim, and it only took 2 minutes to transfer over. I popped it into my iPhone made a test call and it works perfectly.

    So for anyone who is having trouble, I would consider ordering an unactivated AT&T go phone from eBay, and try transferring your plan over, it only costs $3 for the sim
    I can now text/call on my iPhone 4 using AT&T prepaid.
  2. Fernandez21 macrumors 601


    Jun 16, 2010
    You didn't have to go through all of that. Just pop the inactivated At&t go phone sim into a phone, activate it over the phone and then trim it so it fits in the iPhone. It doesn't even have to be unlocked because it's AT&T and the sim is never locked to a phone.
  3. Irish Rose macrumors 65816

    May 29, 2010
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7)

    The iPhone will work for calls and text with prepaid, however, you will need to change the APN settings in order to use data on it. I've been using my old 3GS on AT&T go phone, as a backup to my iP4.
  4. TB07-NJ macrumors 68020

    Jul 7, 2008
    Any reason you can't activate it online?
  5. Fernandez21 macrumors 601


    Jun 16, 2010
    You probably can, I've always done it ore the phone using the automated system, but I don't see why you wouldnt be able to online.

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