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Discuss Phone keeps going into DFU mode at the iPhone 4 - Hackint0sh.org; I have a never unlocked iPhone 4, it is running 4.2.1(8C148) with baseband 3.10.1. I ...
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    Default Phone keeps going into DFU mode

    I have a never unlocked iPhone 4, it is running 4.2.1(8C148) with baseband 3.10.1. I am currently using the gevey unlock sim. Was working great for the last 6 months. Now it is acting strange by spontaneously going into DFU mode. The screen goes completely blank, does not turn back on. I have to give it a few hrs rest, and then I can turn it back on!
    When in DFU mode, if I connect to iTunes, it askes me to restore the phone with 5.0.1 software. (recevery mode)
    Do u guys think it has something to do with the gevey sim card?
    I have not jailbroken the phone ever.
    Is there a solution to this problem?
    Thanks.



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    Super Moderator Array n1ckn4m3's Avatar

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    Does it continue to happen if you remove the Gevey SIM? That's a quick way to test. I know the phone isn't useful without it, but in the interest of troubleshooting...
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

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    yes, i did remove the gevey, but still happenning.

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    Super Moderator Array n1ckn4m3's Avatar

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    Most likely a hardware issue then unfortunately. This type of issue can be related to the battery, if you've been having battery issues prior to this happening it's probably an indicator that it's time to replace the battery.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

    Did we solve your problem? Got a dollar or two spare? Please Donate!


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    thanks for the info.
    any suggestions of a battery replacement place?
    i bought this on ebay


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    battery was holding charge fine prior to this happening.
    yesterday, I found the phone to be extremely hot! and had discharged the battery completely. I charged the phone and after 1 of its cycles turned it back on.
    now i do find the screen "flickering"--- never happened before.
    looks like whatever the problem is getting worse!

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    Super Moderator Array n1ckn4m3's Avatar

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    Almost guarantee it's a battery issue. Buy a genuine Apple replacement battery online and replace yourself (kind of a hassle) or just bring it to an Apple store and have them replace the battery. Non OEM batteries cause issues in a lot of cases. Sure, you could be lucky, but it's a crapshoot. I recommend a genuine Apple manufactured battery.
    The preceding forum post has been brought to you by the letter "N" and the number 42.

    iPhone 4, 32GB (iOS 6.1.2 | evasi0n | SHSH: 4.0 - 6.1.2)
    iPad 2 3G, 64GB (iOS 6.1.2 | evasi0n
    |
    SHSH: 4.3 & 4.3.3 - 6.1)

    Restore problems? Read this: http://www.hackint0sh.org/f137/130802.htm

    Did we solve your problem? Got a dollar or two spare? Please Donate!


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    Quote Originally Posted by mas8002mi View Post
    I have a never unlocked iPhone 4, it is running 4.2.1(8C148) with baseband 3.10.1. I am currently using the gevey unlock sim. Was working great for the last 6 months. Now it is acting strange by spontaneously going into DFU mode. The screen goes completely blank, does not turn back on. I have to give it a few hrs rest, and then I can turn it back on!
    When in DFU mode, if I connect to iTunes, it askes me to restore the iphone with 5.0.1 software. (recevery mode)
    Do u guys think it has something to do with the gevey sim card?
    I have not jailbroken the phone ever.
    Is there a solution to this problem?
    Thanks.
    DFU mode is a hardware failsafe, the hardware is designed to only enter this mode if something is wrong with startup.

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    DFU Mode

    To force your iPhone, iPod touch or iPad into Device Firmware Upgrade (DFU) mode, follow these simple steps:

    1. Connect your iPhone, iPod touch or iPad to your PC or Mac with the USB cable and turn off the device by pressing and holding the power button until you see the Slide to Power off option appear. Slide it to turn off the device.

    2. Hold down both the Home and Sleep/Wake button for 10 seconds.

 

 

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