how to hard reset Asus A639 | How to hard reset Smart phone

Asus A639 Soft reset

Reset switch - allows you to perform a soft reset in case the device malfunctions, or when an application hangs. Press the tip of the stylus on this switch to reset the system.

Asus A639 Hard reset

To perform a clean reset, press and hold the Speak Asus A639 Hard reset Soft reset

button while simultaneously pressing the
Mode Switcher button Asus A639 Hard reset Soft reset

and pressing the stylus on the reset switch.
Then a warning message appears. Press

to do clean reset, or press

to leave the operation screen.
Performing a soft reset will not change the data in the device; while performing a clean reset will delete all data.