Yes, it is possible for K300i & K750i but for W810i won't work. It has been tried and failed with Cruiser Box, less chances with a cracked version of Zulea's program! onlyone, gabriel nunu has tried several times & several phones to read all codes using Cruiser Box and licensed software, and everytime, in the end of the operation, the program returned an error, and the phone could be used again only after flashing MAIN again, considering that Cruiser doesn't need suported firmware, you cand do everything with it, with the phone's current firmware.