How to set Password for Phone lock in Samsung REX 90(GT-S5292)?

a). Tap on Menu as shown below.

b). Now, Tap on Settings.

c). Under Settings , Tap on Security.

d). Under Security, Tap on Phone.

 e). Tap on  Phone Lock as shown below.

NOTE: If you want to change or reset the password , Tap on Change password instead of Phone Lock.

 f). A confirmation window will appear , Tap on Yes.

g). Type the password .Then, Tap Done.

 h). Confirm the phone password again by retyping it. Then , Tap Done. 

 Observe that the phone has now been enabled with Phone Lock.