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Thread: 3g upgrade 3.1.3 to 4.x?

  1. #1
    Default 3g upgrade 3.1.3 to 4.x?
    ]I JB my 3g awhile back using redsn0w. My baseband is 5.12.01 and i used ultrasn0w to unlock it.

    But now i want to upgrade to a 4.x version. Reason for it is i cant send mms. On my other 3g its also JB but on 4.2.1 but on messages theres a little camera option to add a pic to the message. But not on my 3g with 3.1.3.

    So i have read some other threads and so far i have sn0wbrezze installed and tiny umbrella on my pc. On the phone i go to cydia on on top it shows SHSH:ios 4.1, 4.2.1

    Now i ran sn0wbrezze and downloaded firmware 4.1 next on the screen it asked to simple mode, expert mode and BB preserve mode. I havnt gone any further, Am i on the right track or is there a step i missed.

  2. #2
    Livin the iPhone Life xboxbml's Avatar
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    Personally I would stay on 3.1.3....4 just slows the phone down...

    But if u insist on upgrading I would go to 4.2.1....u could try 4.1 first...

    U should be able to send mms...could u before?..

    Hmm..sorry I didn't read ur post well enough...it must be an unlock thing?...why u can't send mms on 3.1.3 phone... My wife has 3G on 3.1.3 and can send pics just fine..

    We r on AT&T...no unlock

    U could try 3.1.3 restore and re-JB and unlock...I don't unlock so maybe someone else can help with more knowledg
    Last edited by xboxbml; 01-31-2012 at 03:48 PM.

  3. #3
    yeah 4.2.1 on my other 3g is slow compared to the 3g on 3.1.3. And im not with AT&T. im using simple mobile maybe i could try a diff carrier i guess.

    Ok so to go to a Jb 4.x firmware from a jb 3.1.3 is the same process as when i first jb the phone?
    Last edited by evo9; 02-02-2012 at 12:26 AM.

  4. #4
    Quote Originally Posted by evo9 View Post
    ]I JB my 3g awhile back using redsn0w. My baseband is 5.12.01 and i used ultrasn0w to unlock it.

    But now i want to upgrade to a 4.x version. Reason for it is i cant send mms. On my other 3g its also JB but on 4.2.1 but on messages theres a little camera option to add a pic to the message. But not on my 3g with 3.1.3.

    So i have read some other threads and so far i have sn0wbrezze installed and tiny umbrella on my pc. On the phone i go to cydia on on top it shows SHSH:ios 4.1, 4.2.1

    Now i ran sn0wbrezze and downloaded firmware 4.1 next on the screen it asked to simple mode, expert mode and BB preserve mode. I havnt gone any further, Am i on the right track or is there a step i missed.
    How can I upgrade my iPhone 3G IOS 3 to Ios 4

  5. #5
    Livin the iPhone Life xboxbml's Avatar
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    If u don't need unlock, plug into pc fire up iTunes, and click update...personally, I wouldn't go higher than 3.1.3 on 3g...

  6. #6
    But I never saved it on 4.2 ?? So does this mean I can go back down to 4.2 and downgrade my baseband

  7. #7
    Livin the iPhone Life xboxbml's Avatar
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    Never saved what?...blobs?...4.2.1 is highest iOS for 3G...apple will allow 4.2.1 forever...don't need blobs...especially for 3G...but preserve basebands.! Once you've updated baseband, you cannot downgrade the baseband! That's permanent. If u have unlockable baseband u MUST preserve it!

    And if u truly have the 3G, u can put in DFU mode and downgrade from 4.2.1 to 3.1.x I believe...but baseband will not downgrade..so preserve that baseband if u unlock!
    Last edited by xboxbml; 02-15-2012 at 04:58 AM.

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