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Thread: 3GS 4.2.1 w/ 6.15 - No Service?

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I recently bought a used 3GS that had the 4.1 firmware and 6.15 BB on it. Without thinking, I upgraded to 4.2.1 without saving the SHSH. Now I'm on 4.2.1
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  1. #1
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    Default 3GS 4.2.1 w/ 6.15 - No Service?
    I recently bought a used 3GS that had the 4.1 firmware and 6.15 BB on it. Without thinking, I upgraded to 4.2.1 without saving the SHSH. Now I'm on 4.2.1 with the 6.15 BB and I have the tethered jailbreak and ultrasn0w 1.2 installed. However, I get "No Service" when I enter my T-Mobile SIM card. I've tried everything from Airplane mode to Resetting Network Settings. Can anybody please help me?

  2. #2
    iPhoneaholic Turnamental's Avatar
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    Quote Originally Posted by AppleFan21 View Post
    I recently bought a used 3GS that had the 4.1 firmware and 6.15 BB on it. Without thinking, I upgraded to 4.2.1 without saving the SHSH. Now I'm on 4.2.1 with the 6.15 BB and I have the tethered jailbreak and ultrasn0w 1.2 installed. However, I get "No Service" when I enter my T-Mobile SIM card. I've tried everything from Airplane mode to Resetting Network Settings. Can anybody please help me?
    If it was unlocked on 4.1 with BB 6.15.00 then you should most def have the shsh saved on Cydia.

    Downgrade to custom 4.1 ipsw and JB/Install Usn0w...

    I say just keep 4.2.1 and follow this video to the letter

    http://www.youtube.com/watch?v=0I1dNq5g3Kk&feature=youtube_gdata_player
    Last edited by Turnamental; 01-20-2011 at 11:59 PM.

  3. #3
    iColor Themes DevouredDreams's Avatar
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    did you turn 3g off?

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    your kinda lucky man,
    you are able to get to
    the springboard..i cant
    even get there..im stuck
    in emergency call for
    bout 3days now..ive
    done all the guides but
    it isnt working for me..

    3gs 4.2.1
    baseband 6.15.00
    stuck un emergency call

  5. #5
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    It was NOT unlocked on 4.1

  6. #6
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    so what should i do now?
    help me outta here
    emergency call screen..

  7. #7
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    common problem. you should utilize the search button.

    replace the lockdown folder as per

    easy way to solve diff sim detected (emergency mode ) after jailbreak - GSM-Forum

  8. The Following User Says Thank You to Aydn For This Useful Post:

    i88ram (01-22-2011)

  9. #8
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    Thankz a lot!!! It worked!!!

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    What's Jailbreak?
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    Click the thanks button

  11. The Following User Says Thank You to Aydn For This Useful Post:

    i88ram (01-22-2011)

  12. #10
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    how about this kind of 3gs problem?

    Unclickable WiFi button,
    Unclickable Bluetooth button,
    no IMEI
    no ICCID
    and no MODEM FIRMWARE..

    and then in 5-10mins it just
    restarted itself..


    later its in 4.2.1,ive
    downgraded it to 4.1

    but still the same..



    http://mail.aol.com/33124-111/aol-1/...wMail&partId=2

    http://mail.aol.com/33124-111/aol-1/...wMail&partId=2
    Last edited by i88ram; 01-22-2011 at 03:38 PM. Reason: Automerged Doublepost

  13. #11
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    I'd appreciate it if you'd stop hijacking my thread.....can anybody else help me?

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