New here, not a techie so bear with me please..........I have a sprint optimus lg that is not clean, I assume because the person did not pay their account....is there any way to "clean" this phone so I can use it? I currently have sprint. If not or if I would have to be a rocket scientists to do it, my other question is, can it be flashed to metro pcs EVEN with a dirty ESN? Help is appreciated, lost here! Thank you.