Question [Q] Can I help me about "Lock the device"?

Hi guys,

First post, so, firstly, hello! I've been using this website for a while,
I have a question that need to help.
I'm using S620 n I have installed App F-Secure Mobile Security to Anti-theft only.(this app will send a private message to me when SIM changed.)
To enable Remote Lock Function, I must set my S620 locked.
However if the device locked, when U start your device, it will require to type your password. How must I do to disable this func. when starts. Because when my device is stolen, if it locked, the theft can hard reset all.
It want to be a Remote Control and a Remote Lock that the theft don't know!
I tried to search and found "Device Lock.exe" and "Device Lock.mui" files in Windows Folder but I can't open Device Lock.mui
Thanks!