Lg L1150

My Sony Ericsson z500a is junk--I never get my text messages until 2-3 days later--therefore I want to use an LG L1150 that a friend of mine gave to me--problem.....when I put my sim card in it asks for a restriction code. I tried the default 0000 but it did not work. Does anyone know the restriction code or how to find it or how to go about unlocking this phone? I tried the NokiaFree Calculator but this particular phone wasn't listed in the choices. Any help will be greatly appreciated!!