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My phone has gotten extremely slow, and the GPS no longer seems to function which is the main reason I got the phone.

My phone is a Samsung Galaxy S 4G from T-Mobile.

Is it possible to reset it completely? I read several reset guides, and they said to hold the volume down + power and volume up + power but neither of those worked.

Thank you

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I don't have that particular model, but every Android phone I've owned has had a "Factory Data Reset" option. On my Nexus S, it's under Settings/Privacy.

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Use one of the following USSD codes to do what you want:

*#7780#        Factory Reset  
*2767*3855#    Full Factory Reset  
*#*#7780#*#    Factory data reset

Source: XDA Developers Forum

A full factory reset is also known as a hard reset. It deletes all of your user data, firmware settings, and wipes your SD Card as well. Factory resets do not wipe the SD Card. Basically, a hard reset leaves nothing but the last ROM flashed. This is probably what you want.

Factory Reset vs. Hard Reset

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