. This is essential if you want to downgrade to an iOS version that Apple is no longer "signing," provided you saved the blobs while that version was active. Custom Firmware Support
: Performs a low-level format of the device's storage, making data recovery nearly impossible. This process is significantly slower and is intended for those selling or disposing of their device. pro flash 3utools
Pro Flash works best when the device is in , not standard Recovery mode. pro flash 3utools
: A deep-formatting mode that prevents data recovery after the flash is complete, ideal for users selling or giving away their device. pro flash 3utools