iPhone 3GS

Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.

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does battery replacement lose every thing on iPhone?

Is all data and apps and music lost during battery replacement?

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The iPhone memory is non-volatile flash, which means that you won't lose data by disconnecting (or completely draining) the battery.

However, you should *still* do a full backup before attempting any repair or sending in a device for service. For non-jailbreak iPhones, the iTunes backup is very complete.

For jailbreak phones, install AppBackup from Cydia and follow its backup instructions, then backup using iTunes. If you need to restore, you'd have to re-jailbreak, install AppBackup, restore from iTunes, then restore your jailbreak apps using AppBackup's restore features.

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AFAIK not.

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I replaced the 3GS battery and lost nothing.

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dickm will be eternally grateful.

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