if user code, yes, if network code, yes by flashing and unlocking using patch. for user code, download xs from the download section, turn off phone, take out battery and reinsert it back again, start xs, click the connect button on xs, press and hold c button on the phone and connect it with your usb data cable, you will see a connecting information, within the gdfs, select the phone lock, your user code will get reset it to 0000