Once 3uTools recognizes the device is in DFU mode, select the firmware and click . Troubleshooting Summary Potential Cause Action to Take Error -75, Phone disconnects Unstable connection Change cable/use rear USB port. Error -75, Fails at 20-30% Low Power/Weak Battery Use "Fix Battery Health" in Smart Flash. 3uTools cannot see phone Driver Corruption Reinstall Apple Drivers in Device Manager.

Is the device currently stuck on an or Recovery mode screen ? Share public link

Use an official MFi-certified USB cable. Avoid aftermarket extenders.

Error 75 usually does permanently brick the device. After a failed restore, the iPhone or iPad often remains in recovery mode. Simply force restart it (press Volume Up, Volume Down, hold Side button until Apple logo appears) and try the fixes above. If the device cannot exit recovery mode, DFU restore with a clean IPSW is your best bet.