Since iOS 14 release, I am not able to update my iphone 11 by using iTunes. It shows error as "The Phone ............could not be updated. An unknown error occured (4000). During last 14.3 update I have used recovery mode and restored it as new phone and didnt restore any backup. But again for 14.4 update it shows same error 4000 error.
I can update it on OTA but want to find out the reason behind this error. Apple support forums dont have any solutions for this and Apple support on phone also couldn't find reason behind this and advised me to visit SC. Not sure if that will help as they will again restore it from scratch and I might face same problem at 14.5 upgrade.
Any suggestions for me?
- Tried iTunes reinstall.
- Has all Windows updates installed in the pc.
- Restarted phone and PC both.
- Tried on 3 different computers with different ISP.
I can update it on OTA but want to find out the reason behind this error. Apple support forums dont have any solutions for this and Apple support on phone also couldn't find reason behind this and advised me to visit SC. Not sure if that will help as they will again restore it from scratch and I might face same problem at 14.5 upgrade.
Any suggestions for me?