I want to put password protection for k550i sony

You can Unlock the mobile phones from the Security Lock(Password) lock using the Master Reset Code,You can get the Master Reset Code at Reliable Cost here
http://www.mobileunlocksolutions.com/unlocking-services/rs1wp6/ and Unlock the mobile from the Security lock,You Can Check whether Your model in the List!!!!!!!!!

OPEN SETTINGS FROM THERE U CAN SEE SECURITY FROM THERE YOU CAN TYPE PASSWORD AND LOCK UR PHONE

The best you can do is go to a phone shop and buy a cleaning set it often removes scratches.Or just buy a protective cover.

hi i have a sony ericsson k550i phone and i put a lock code on it but i don't remember the code 

did you try to go on settings camera and restore settings.Try it .You should watch if the protection from the camera is opened.She must have some protection on the camera.

my k550i is locked.i have forgotten the code.how to open the lock?

Here u'll get the easy solution dude; Download the FileLock java application here and secure all ur files in mobile a Password. Get it from FileLock
##Srinivas JR##

With xs++ you reset the password to 0000.
Open the xs++ and one of the choices is GDFS, this is that you are use to reset.You connect the phone to pc with usb and...

*** MACEDONIA IS GREEK ***

What kind of code is it asking for?

If it ask for a PIN code then it means it's asking for the password/code you have entered on your SIM card. If it asks for Security code then that means it's the password/code for the phone.

Entering three invalid PIN codes on your phone then your PIN may be locked and you can only unlcok it by entering the PUK code on your SIM. PUK code is available on the sim card pack. Once it's ented, you have the option of changing your PIN code. Just be sure to remember your PIN code so the same incident won't happen again. If it ask for security code, enter the code you have for the phone but if you don't remember setting a security code, then you may try the default security code of Sony Ericsson phones which is 00000.

Sorry no such softwares supported to sony !!!