[Link9228]

it doesn't matter if you've changed the radio and changed the ROM, if you let the customizations run, the GPS chip is locked down to only work with VZ Navigator. Doing the steps in the link, you will unlock your GPS chip. After doing those steps, you'll have to dial verizon's customer service and have them re-authenticate your phone. You have to call from another phone. Tell them you had to do a hard reset. Shouldn't take more than a few minutes and you'll have working GPS. I just did it last week and everything's perfect now.