Tool: 3utools Method: Step1: Download and install the latest 3uTools on PC. Launch 3uTools and connect your iPhone to it. Click Toolbox ->Backup/Restore -> Backup iDevice. Step2: After iDevice is backup successfully, you need to flash your iDevice using 3uTools. Click Flash & JB -> select the firmware 10.2.1-> click Flash, and then just wait until this process is completed.… Continue reading "Downgrade iOS 10.3 To iOS 10.2.1 Method"
Category: iPhone Software
Error 1 Unable to downgrade. Try changing the USB port (the back one of chassis is better) and restart computer. The installed version of iTunes may also be too old. Update iTunes. Error -1 Error occurs when one uses the “last ditch” method for preventing baseband updates on the iPhone 4. The baseband does not get updated using this method.… Continue reading "IPhone restore problem solution"