How To Lock/Unlock On AT&T Samsung Magnet A257 Phone?
My friend was got a new AT&T Samsung Magnet phone,now here is a problem with the Samsung Magnet,he said:”How Do I Use Key Guard Or Key Lock On My AT&T Samsung Magnet A257 Phone ?”i help him to found the answer in Samsung official website,the following are steps:AT&T Cell Phones Faq
To lock the keypad press the Keypad Lock key 
 (#12 below) then press the left soft key for Yes. To unlock press the left soft key for Unlock then press the OK key.
-AT&T Samsung Magnet cell phone photo:
The Samsung Magnet handset also features four other lock features ( Auto Keypad Lock, Phone Lock, SIM Lock and Application Lock,if you want to know how to lock them,click here.
