Question about Apple iPhone 3GS Black (16 GB)
Please tell me how many time use erase all content and setting
It depends if u wanna keep resetting ur settings to factory settings. otherwise it will make no sense.
Posted on Mar 28, 2014
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Posted on Jan 02, 2017
DFU means Device Firmware Update. If a
restore using Recovery Mode doesn't work you will want to use DFU Mode
as a last resort. When placing your iPhone into DFU Mode it does not
load the OS before attempting the restore
Watch the Video!
For your convenience this tutorial is available in video format also. Click the Watch It button to view the tutorial!
To put the iPhone into DFU mode so you can do an iTunes firmware restore follow these steps:
Open iTunes and connect the iPhone to your Mac.
Press and hold the Home button and the Sleep/Wake button at the same time.
After exactly 10 seconds release the Sleep/Wake button. Continue holding the home button until you iTunes pops up a message telling you that it has detected an iPhone in recovery mode.
The iPhone screen will remain black like this:
NOTE***: It may take a few attempts to get your iPhone into DFU mode. Generally, I hold down both buttons then release the Home button just before I think the Apple logo would appear. If you are still holding both buttons down and you see the Apple logo you are holding them down for too long!
Posted on Aug 12, 2009
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