pls HELP me to flash format my mobile

[remo18m]

my mobile is SAMSUNG GT-C5212i
pls help me to flash format
my mobile is some times it automatically "switch off"
nd running slowly.....

 

[IMEI Source]

my mobile is SAMSUNG GT-C5212i
pls help me to flash format
my mobile is some times it automatically "switch off"
nd running slowly.....

its often restarting or just turn off?

 

[IMEI Source]

my mobile is SAMSUNG GT-C5212i
pls help me to flash format
my mobile is some times it automatically "switch off"
nd running slowly.....

Your phone is restart often or just turn off?

 

[remo18m]

Your phone is restart often or just turn off?

turn off.....