This mode will do a pwning of your device without a restore. It is for phones that are already working and you just want to jailbreak. If you have to restore anyway, use one of the other modes instead.
Winpwn 2.5 offers quickpwn. Here is how to use it:
DFU (Device Firmware Upgrade) mode is not the same as restore mode. DFU mode bypasses the current OS installed and allows you to upgrade or downgrade your OS. If you are getting errors trying to restore in iTunes, DFU mode is very likely for you.
This is how to achieve DFU mode. You can do it on every phone:
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