cellular hellular

Imagine for me if you will, dear reader, that one day you are taking a nice afternoon stroll in the countryside. It's a beautifully sunny summer's day; as you're walking along, the sun glints off something in the hedgerow just ahead and catches your eye. Intrigued, you stop, stoop and discover a mobile phone nestling in the bottom of the hedge. You pull it out and inspect it.
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You are shocked (and slightly pleased) to discover that it is a state-of-the-art mobile phone in almost perfect condition. You look around you to see whether you can spot anyone ahead who might have dropped it, but the field in which you are walking is empty apart from you and a handful of disinterested sheep. So you place it in your pocket and walk on, vowing to decide what to do with it once you are home. You carry on with your walk, which is thoroughly enjoyable, all the while contemplating your next step.
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Once home you spend 15 minutes trying to figure out how to turn it on and, when you eventually succeed, you discover that it has 21 missed calls and 16 texts. Unfortunately you can't access the texts as the inbox is password protected. However, the photo album isn't password protected and you scroll through the photographs, feeling a little uncomfortable looking at someone else's personal stuff, but you discover that the phone seems to have been lost by an obviously well-off young schoolboy who enjoyed taking photographs of himself and his friends in mirrors wearing their posh school uniforms. You manage to discover the phone's own number, which - out of idle curiosity - you call with your own mobile only to discover that the number has been taken out of service. You conclude that the person who lost this phone has reported it missing and the network has then killed off the SIM.
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What is the next step, dear reader? Do you contact the number on the back of the SIM card and report the phone missing? Do you take it to the local police station and hand it in, like a good citizen? Perhaps you're of the opinion that if this kid is rich enough to own a £300 5 megapixel camera-phone that is only currently available on a £35 a month contract, he'll be rich enough to jolly well get his parents to bally well buy him another one / get the network to replace it / replace it on daddy's home insurance. Maybe you think he's got what he deserved, that if he took care of such expensive equipment he wouldn't be in this position; perhaps it's taught him a lesson about the value of things, the ungrateful, spoiled little shit.
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So - what would you do?
Keep the phone, get it unlocked, buy a charger off ebay, download the owner's manual off the phone website and stick your existing SIM in it?
Report it missing to the network?
Take it to the police?
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Even though this whole scenario is made up and completely hypothetical and, furthermore, no mobile phones of any description have been found by anyone connected to Fremescent, your thoughts on how to proceed would be much appreciated....