Hey hows it going everyone, so I recently has the LG Connect 4G for Metro Pcs and must say it was a shitty phone that in the end broke down on me. So now I am in the market in buying a used Galaxy S4 but have some questions and concerns I am hoping you guys can help answer. The phone will be going on Metro Pcs so i know the phone needs to be unlocked? and a clean esn? here are my questions... 1. Besides the obvious wear and tear I should be looking for in buying a phone how can i know if the phone has a bad ESN? 2. I've read scenarios online where people have unknowingly bought phones that have been cloned? what exactly is a cloned phone and how would i know if the phone I'm purchasing is cloned? 3. Might sound like a noob question but how can I tell if a phone is unlocked?