Instruction I:


1. Turn off the phone.

2. Turn it back on. Done!


Instruction II:



1. Power up the phone.


2. Press & hold the Volume Up and Power buttons.


3. Done.

Instruction III:

 

1. First, press'n'hold the Power button until a menu will appear.

2. Second, select the Restart option.

3. Wait for a few seconds and then press'n'hold the Power button until the phone turns back on. Done!