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Thread: "No Service" for unlocked, JB iPhone 3g 4.2.1

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I have an unlocked, JB iPhone 3g 4.2.1. It was working fine for years and I was able to change sim cards with no problem. Yesterday is when the I
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  1. #1
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    Default "No Service" for unlocked, JB iPhone 3g 4.2.1
    I have an unlocked, JB iPhone 3g 4.2.1. It was working fine for years and I was able to change sim cards with no problem.

    Yesterday is when the I first experienced this "No Service" problem. When I turn on my iPhone it asks for my pin and immediately, without searching, it says: "No Service"

    These are the things I have already tried:
    -holding down sleep and home button to reboot
    -removing sim card and then putting it back in
    -putting a different SIM card in from a different service provider but the same thing happened (so it's not a sim card problem)
    -toggled on and off airplane mode
    -Settings-->General-->Network-->changed toggles to see if different setting helped
    -Settings-->General-->Reset-->Reset Network Settings
    -Setting-->Phone-->My Number says "Unknown" (and I can't change it)

    Any other ideas?

    Thanks in advanced for your help!

  2. #2
    Green Apple MazZafar's Avatar
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    I have the same problem, help would be appreciated
    Maz

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    Super Moderator iYeow's Avatar
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    You probably have ipad baseband installed. Run latest redsn0w 0.9.15b3 and choose downgrade ipad bb to 05.13.xx. Ipad bb is unstable and will results in no service.

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    Green Apple MazZafar's Avatar
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    Just tried it, downgraded baseband. Came back on searching for service and wifi was greyed out. Then a message saying phone cannot make or receive calls will have restore from itunes.

    Going to try it again

    Tried again it says there is a usb communication problem which is bull because when I try with an older version of redsnow i can do the whole process with no problem only down side is the phone is not open to any network
    Last edited by MazZafar; 03-24-2013 at 09:24 AM.
    Maz

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    Super Moderator iYeow's Avatar
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    Can you see your baseband number ?

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    Green Apple MazZafar's Avatar
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    Modem firmware is 06.15.00
    4.2.1 version

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    Super Moderator iYeow's Avatar
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    You haven't downgraded your iPad bb. Once downgraded , it should be 05.13.08 n can be unlocked by ultrasn0w. When u run red snow , select your 4.2.1 ipsw and then do the bb downgrade.

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    Green Apple MazZafar's Avatar
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    9.15b3 total waste of time, starts to load the iphone then turns it into a brick with a faint black screen screen.
    Used an older version to get it to boot up.
    Can I mail you mate?
    Maz

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    Super Moderator iYeow's Avatar
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    Use this Snowbreeze to build your 4.2.1 custom firmware > www.iH8sn0w.com.
    If you don't have a sim to activate, then choose activate option when building your custom firmware.
    Once created, put iphone into pwned dfu mode and do the restore.
    Once restored, run redsn0w 0.9.14 to downgrade ipad baseband to 05.13.08.
    Install Ultrasn0w to unlock.

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    Also note that with 3g and some 3gs, you have to repeat the baseband downgrading procedure twice for it to work (a known bug).

    From my experience, on some units I had to upgrade to iPad baseband (even though it's already installed) then do the downgrading twice. Good luck

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    Green Apple MazZafar's Avatar
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    I'm really not having any luck, even iTunes won't get it back on. Gets into dfu mode
    Maz

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    Green Apple MazZafar's Avatar
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    Okay this is what is happening run redsn0w 0.9.15b3 tick the baseband box starts unpacking.

    Waits for reboot which doesn't happen phone goes blank and will not switch on

    Go to iTunes and do restore standard and custom restore with snowbreeze 1.7. Standard gets me back to dfu mode with error on itunes the custom doesn't work at all.

    Done this countless times.

    Tried limera1n power button home release power etc did that makes all the right noises then goes blank and won start. Unplug cable sound from pc on unplug and replug in. Screen still blank
    Last edited by MazZafar; 04-17-2013 at 03:19 AM.
    Maz

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    MazZafar... I'm confused on what you're trying to do. Are you trying to downgrade baseband 6.15 to 05.13.04? Or, are you trying to restore firmware to 4.2.1?

    First, let get your iphone back on 4.2.1 with iPad baseband (6.15). Second, once everything is working then downgrade baseband to 05.13.04.

    1. I'm assuming that you have a backup and can restore later

    2. Follow this tutorial to put your phone back on 4.2.1 and iPad baseband:
    How to Update & Jailbreak iPhone 3GS / 3G Baseband to 06.15.00 with Redsn0w 0.9.6b5 for iOS 4.2.1 Unlock | Redmond Pie

    3. After step 2 is successfully done, then, follow this guide to downgrade baseband to 05.13.04
    iClarified - iPhone - How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Windows)

    4. Once step 3 is done then follow this guide for unlock
    iClarified - iPhone - How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

    Good luck

  14. The Following User Says Thank You to hcgaloi For This Useful Post:

    MazZafar (04-20-2013)

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    Super Penguin Mod i.Annie's Avatar
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    What are your errors when restoring to stock and custom?

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    Green Apple MazZafar's Avatar
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    Quote Originally Posted by hcgaloi View Post
    MazZafar... I'm confused on what you're trying to do. Are you trying to downgrade baseband 6.15 to 05.13.04? Or, are you trying to restore firmware to 4.2.1?

    First, let get your iphone back on 4.2.1 with iPad baseband (6.15). Second, once everything is working then downgrade baseband to 05.13.04.

    1. I'm assuming that you have a backup and can restore later

    2. Follow this tutorial to put your phone back on 4.2.1 and iPad baseband:
    How to Update & Jailbreak iPhone 3GS / 3G Baseband to 06.15.00 with Redsn0w 0.9.6b5 for iOS 4.2.1 Unlock | Redmond Pie

    3. After step 2 is successfully done, then, follow this guide to downgrade baseband to 05.13.04
    iClarified - iPhone - How to Downgrade Your iPhone 3GS, 3G Baseband for Unlock (Windows)

    4. Once step 3 is done then follow this guide for unlock
    iClarified - iPhone - How to Unlock the iPhone 4, 3GS, 3G Using UltraSn0w

    Good luck
    Hi there I am trying to get the phone to at least come on so i can use it as is without a sim. this phone i jailbroke years ago and got a good year of usage with another provider, not the one the phone was locked to.


    I downgraded the baseband and was running it on 4.2.1
    At the moment I can't do anything with it.

    I am going to try your advise, watch this space with fingers crossed :-)

    Quote Originally Posted by i.Annie View Post
    What are your errors when restoring to stock and custom?
    I will take note of the errors
    Maz

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    Green Apple MazZafar's Avatar
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    Okay update time, the phone is ON got no service, doesn't recognise any sim.
    The wifi works.
    I am on ios 4.2.1
    BB Firmware 06.15.00

    All I want is that I can use the phone with my o2 sim in the UK

    Can I use fuzzyband from the cydia site off the phone?
    Last edited by MazZafar; 04-18-2013 at 03:53 PM.
    Maz

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    Super Penguin Mod i.Annie's Avatar
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    Downgrade your baseband. Fuzzyband may or may not work, depends on the devices bootloader. You could try Fuzzyband, if it does not work, use Redsn0w. Hit Jailbreak, untick everything except downgrade baseband, and you're all set. If you need to unlock install Ultrasn0w. If not, you should have better luck with getting service on baseband 5.13.04 rather than staying on 6.15.00.

  19. The Following User Says Thank You to i.Annie For This Useful Post:

    MazZafar (04-20-2013)

  20. #18
    Green Apple MazZafar's Avatar
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    Quote Originally Posted by i.Annie View Post
    Downgrade your baseband. Fuzzyband may or may not work, depends on the devices bootloader. You could try Fuzzyband, if it does not work, use Redsn0w. Hit Jailbreak, untick everything except downgrade baseband, and you're all set. If you need to unlock install Ultrasn0w. If not, you should have better luck with getting service on baseband 5.13.04 rather than staying on 6.15.00.
    This is where it may go toes up!!!!
    Fuzzy does not support my phone I used the latest one and also the 3G versi
    Ultrasnow is where I may get stuck if it don't come back on reboot.
    Will try tonight and let you know.
    All being good thanks to all of you for your help

  21. #19
    Green Apple MazZafar's Avatar
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    Woo hoo ;-) sorted.

    I used redsn0w9.8b7 restore file 4.2.1

    When it rebooted connected to my WiFi and went to Cydia icon

    Went to Changes tab and scrolled down till I saw Ultrasn0w

    I installed Ultrasnow on the phone. Ran the software on restart got service.

    Thank you everyone once again ;-)
    Last edited by MazZafar; 04-20-2013 at 02:05 PM.

  22. #20
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    I have suffered more than one month to activate my airtel sim in my iphone 3G. After googling, I tried every procedure posted in many sites but unable to solve the NO SERVICE, NO WIFI issue. Today , I done it. The procedure which may help you to activate your iphone 3g with non AT&T sim is given below.

    IPHONE 3G , 4.2.1 with modem firmware 06.15.00. SIM use AIRTEL INDIA

    build custom ipsw with Snowbreeze , output file located in DESKTOP : sn0wbreeze_iPhone_3G-4.2.1-8C148.ipsw

    1.First jailbreaked with redsn0w_win_0.9.15b3 by installing cydia.
    2.And again restore my iphone with ITUNE,
    3.Again used redsn0w_win_0.9.15b3 to downgrade modem firmware. two times. ( nothing happened , as I seen the modem firmware after downgrading it was same 6.15.00.

    4]. Restore using Itunes using the custom firmware which is located in Desktop which was made by sn0wbreedge.

    5]. Download Blizzard_v0.3 ( see step5 directory 3 Nos ultrasn0w unlock files you will find there.

    6]. download itools and imported the above 3 files to filesystem->cydia and restarted , voila....

    Please try above or mail me at [email protected].

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