IOS update with iTunes - error 4000
Error 4000 when updating iPhone 12 in iTunes
Upgrade blocked
iPhone 12, iOS 15
Question marked as
Stéph18 Said:
"IOS update with iTunes - error 4000: Error 4000 when updating iPhone 12 in iTunes Upgrade blocked [...]Solved. Must completely remove the passcode before trying the IOS upgrade from iTunes. Once the upgrade is completed, put back the passcode to protect your phone."
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