If you want to do a factory reset on your LG GW300 and you’ve lost your user code, then you have to entry into the engineering mode. In the following times, you will find it is very easy to do a factory reset without the user code.
When you open your LG GW300, Dial 1809#*500# on your LG GW300 and choose Factory reset. No code required and phone don’t ask: "Are you sure?". All settings will be reset to default values, including the user code (0000 is the default code). Good luck! If you still have any problem, leave your question and I will give your my answer as soon as possible. LG Phone Problem and Solution
LG GW300 Phone Photos - LG Cell Phone Pictures