1000000 % tested by me
1 off your mobile
2 hold fst n last home key (under screen) and power key
3 click on emergency call
4 typ *#*#7378423#*#*
5 click on coustomige seting
6 rest coustnzn
7 phone will be re start
1 off your mobile
2 hold fst n last home key (under screen) and power key
3 click on emergency call
4 typ *#*#7378423#*#*
5 click on coustomige seting
6 rest coustnzn
7 phone will be re start