I put a 4 digit lock code on my phone. Big mistake. It's a total pain in the neck. I want to remove it. Couldn't figure out how to do that, so I checked LG's website for instructions for this model. Those instructions didn't help: The option to choose "none" is greyed out on my phone. All it will allow me to do is change the code to another, or to another type. I don't want a lock code. So how can I get rid of it?