I found a 300$ phone infront of my house, Google Pixel 2 XL. The thing is that the person disabled the network by reporting it as stolen so it had no line. I took out the sim card and it only had numbers on it. I had no way of getting in contact with the owner.
It had a pw so I waited 2 weeks for the person to come. No one came so I reset the phone. It then asked his gmail pw. I saw a youtube video on how to remove his account and put mine. It worked.
I am using it now.
In the UK, you can hand items you found into the police station, and if no one claims them within a certain amount of time you are legally allowed to take it.