https://www.dailymail.co.uk/news/article-6944559/Traveller-arrested-thrown-hellish-Thai-jail-picking-lost-mobile-phone.html#:~:text=Chris Dodd%2C 29%2C from Poole%2C found the device in,different location with the possession.
Leave it where it is, if I remember there was a foreign guy in chiang mai found a phone on the footpath and took it back to his room, said he was going to hand it in later, he didn't, charged with theft.