Unknown errors like iPhone restore error (-1), iPhone error 9, iPhone error 4013/4005, etc. occur frequently when connecting to iTunes to restore or update iPhone. Many reasons contribute to this problem, such as out-of-date iTunes version, hardware faults with the computer, iPhone software failures or something else. If you can perceive where the problem lies, directly choose the right remedy from the following. If not, you might need to take a moment to try all the methods below until the iPhone error is rectified.
Part 1. Update iTunes to the Newest Version
Part 2. Try the Other Computer
Part 3. Disconnect Other USB Devices from Computer
Part 4. Turn off Anti-virus Software on Computer
Part 5. Losslessly Fix iPhone Restore Error (-1) via Joyoshare UltFix
All the above-stated methods cut no ice with the issue of iPhone restore error (-1)? So then, nine times out of ten it is your iPhone system failures that give rise to such an error when attempting to restore or update it with iTunes. Confronted with this situation, adopting an advanced iOS system recovery software like Joyoshare UltFix is an optimal approach.
How so? Above all, it is a technical iOS repair tool with two repairing modes not simply to settle general issues including various iPhone/iTunes errors without compromising any data loss, but also to address tight problems with no difficulty. Moreover, its broad compatibility enables it to work well with all iOS device models (iOS 13 included) and Apple TVs. Also worth noting is that Joyoshare UltFix gives you an option to make your iPhone enter/exit recovery mode for no fee.