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iPhone4S是第五代iPhone。网络制式为GSM/CDMA ,存储容量有8GB、16GB、32GB、64GB可选,机身颜色有黑色、白色可选。维修iPhone4S是容易的,需要耐心,用到的工具有螺丝刀、撬棒等。

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iPhone cannot be updated an unknown error-1

When I tried to update after restoring iPhone 4s, till 60% it's updating after that unknown error occurs

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@nithinrosh -1 is usually indicative of a failed Baseband (IMEI). You do want to try a few things like:

Use the back USB port on your computer (do not use a hub etc. Depends on your computer of course)

Use an Apple brand charger

Use an Apple brand cable

Clear your computer’s DNS cache (depends on OS and computer)

Restore in DFU mode

Some suggestions other made is a new battery as well as using a different computer. Also, instead of trying iTunes check on 3utools for a restore.

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