If anything else is the case, repeat the steps above until you enter into DFU mode successfully. Again, DFU mode is signified by having a completely black screen on the device. Remember that if you see the restore logo, iTunes logo, or any message on the iPhone screen, you are not in DFU mode but standard Recovery Mode. This is what an iPhone in DFU mode looks like, it’s not much, just a black screen – but critically, it’s detected by iTunes on the computer:Įven though the screen is black, that doesn’t mean the device can’t be interfaced with either iTunes or a custom firmware client (for jailbreaking, etc).
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In some unique situations, it can also be used to install custom firmware that is required for a jailbreak or SIM unlock. This can serve to restore a bricked iPhone where updating iOS has failed and the phone is seemingly broken, but it can also be used sometimes to downgrade to a prior iPhone firmware and operating system.
#Dreamboard iphone 5s update
The primary reason people need to access DFU mode on their iPhone is to update or change the firmware and iOS on the device, either out of troubleshooting requirements, or personal preference. DFU stands for Device Firmware Update.ĭFU mode is generally intended for advanced use only. DFU mode is a state that you can put your iPhone into where it can interface with iTunes, but does not load the iPhone operating system or boot loader (this is what really differs DFU mode from the more simple recovery mode).