Charge your phone
2. SWITCH OFF
3. Simultaneously press the "switch" + "volume down" + "home"
4. Download the Android system recovery
5. Now act quickly, the phone may reboot itself
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a) Press the "volume down" go down to the point of "wipe data / factory reset"
b) Press the power button (here it acts as the "OK" button)
c) We see a lot of "no" and one "yes". Choosing "yes" button is similar to the volume down (you can climb upstairs with the "volume up"). Press the power button.
d) Will the reset process, we wait until the end of the activity on the screen, go back button on the body "back", select "reboot system now" (if the phone suddenly began to turn on itself right after the reset - do not worry)
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6. Phone reset to factory settings, and applications of the data removed