Update iphone 4 to ios 9.3.5 s

When I try to update my iphone 4 iOS s 9.2.1 to 9.3.5 I get an error message "Cannot install the update". No other clues as to what's going wrong. Any suggestions? I have more than 5 GB free and I re-charge of updating several times.

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You can try updating your phone via iTunes rather OTA.

If you want to try OTA and try to force it to close the application settings and remove it from the list of open applications and force restart your phone. If this does help not you can try to reset your network settings, or later, all settings.

If this does not help, im afraid that the restoration is your only option left. (Do not forget to backup your phone first)

Tags: iPhone

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