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Thread: Problem using T-mobile prepaid on iPhone 3gs

  1. #1
    Default Problem using T-mobile prepaid on iPhone 3gs
    I have been using my 1st generation iPhone with T-mobile for months now and I've loved it. Recently a friend gave me their iPhone 3gs which is a big upgrade and I want to use it with my T-mobile prepaid account. The process was so surprisingly easy with the iPhone 2g. Now with the 3Gs it's been a nightmare. I need to know what I'm doing wrong:

    -I jailbroke my phone with the most current Redsn0w software for mac OS.
    -I then unlocked it using ultrasn0w on my iPhone.
    -Then I updated the Network settings for T-mobile with these settings:

    Cellular Data:



    MMS Proxy:
    MMS Max Message Size: 1048576
    MMS UA Prof URL:

    Still my iPhone says "Searching..." I have yet to see it say "T-mobile" or been able to use the phone.

    Any ideas??
    Last edited by TheRealDeal; 2011-12-31 at 12:53 AM.

  2. #2
    Try using APN:


    If that fails, try same for APN,

    but change MMS to:


  3. #3
    Quote Originally Posted by vyvxguy View Post
    Try using APN:


    If that fails, try same for APN,

    but change MMS to:

    nothin... still the same

    I have 5.0.1 version on the iPhone btw...

    and my iPhone isn't the newer fixed model

  4. #4
    You probably need a data plan with the 3GS. I have seen these run on Simple Mobile and H20. Good luck!

  5. #5
    ah crap. really?

    Has anyone used a 3gs on the prepaid plan?

  6. #6
    You do NOT need a monthly subscription. Nobody here has even asked you what baseband firmware you have. If your baseband is a newer version that is unsupported by ultrasn0w, then you simply cannot soft-unlock. If that is the case, you MUST purchase a Gevey SIM adapter for your iPhone. I've been using t-mobile prepaid on the iPhone 2G, 3G, 3GS, and now iPhone 4, for over 3 years. I've worked with my fair share of devices and the only instance where a prepaid SIM couldn't be used on an iPhone was when the SIM slot pins were scraped off by the SIM tray.

  7. #7
    Yeah I didn't believe him. I got it working. Here's the post:

  8. #8
    Ok so I have a Iphone 3gs that I am going to unlock. I have the proper baseband and know I can do it but my question is is there anyway to know that it worked for sure without an active tmobile sim? i have an unactive tmobile prepaid sim but I dont want to activate it until I know im good to go.. so if i put the sim in the phone after its unlocked can i look in settings to check just to make sure its reading it? thanks guys

    edit:why am i up this early? 130am eastern
    Last edited by 1bri982; 2012-01-02 at 07:25 AM.

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