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
To put the iPhone into DFU mode so you can do an iTunes firmware restore follow these steps:
Step One
Open iTunes and connect the iPhone to your Mac.
Step Two
Press and hold the Home button and the Sleep/Wake button at the same time.
Step Three
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!
*thanks iclarified*
www.iPodSets.com
- Posted using my iPhone
and after in went into DFU mode, how do I return the phone to original state?
ReplyDeleteDFU mode is a black screen with NOTHING. If you are referring to recovery mode (with the connect to iTunes logo), then use TinyUmbrella to kick your device out of recovery.
ReplyDeleteso what is DFU mode. i have this iphone that is my girlfriends best friends and she wanted me to unlock it so she can use her t-mobile sim. i belive it is iphone 3g. it had no original sim. when i first pluged it in it said it has to be restored so i did that. it said in valid sim or whatever. i ran "limerain jail break by geahot rc1b".i did what it told me to now it "says in DFU mode...wait".what the heck do i do now???? i'm freacken out over here. shes going to kill ne. HELP PLEASE
ReplyDeletewhat firmware version is her iphone on?
ReplyDelete