Found an iPhone 5 with no sim. How do i return it?

I found an iPhone 5 today on the way home from college but it has no sim and is locked. I want to return it to the owner as they cost a lot however i live in a small town and the local police station has closed down and i don't live near an apple store. I've checked the UK's laws and it's considered theft if i don't take reasonable steps to try and return it so hopefully i get an answer here, thanks.

How much should I sell a IPhone 5C water damaged for?

I own a Iphone 5c only had it for 3 months. Got water damaged so it won't even turn on I mean this looks brand new screen is perf, everything on outside is perf… Just the inside is damaged. So I'm planning on selling it just the buyer would have to Fix everything self… Phone is AT&T so how much would you suggest?

What's good music app for iPhone?

I need a app that downloads free music no pay what so ever for iPhone. I used frostwire on my computer but my computers messed up and I need new music now.

I want the music to go straight to my music playlist like if I downloaded it from the computer it would end up in my iPhone music play list.

I don't want an music app that I have to keep going to to listen to my music…

Any apps?

(Not app like pandora apps that just download music)

ITunes isn't detecting iPhone since update?

I updated my iTunes last night and since then, it hasn't detected my iPhone. I've tried the two wires I have and it hasn't work on either of them but it does charge. When I plug my iPhone it, my computer makes a noise to tell me that a device has been connected and I get a message on my phone asking if I "trust this computer" and when I click "trust", my computer makes a noise to tell me that a device has been disconnected, but my iPhone still charges, is anyone else having this issue with the latest update or does anyone have any advice/solutions?

Converting tmobile iPhone to AT&T?

Is it possible to convert a tmobile iPhone 5 to AT&T? My brother wants to switch to AT&T. But I recently (about6months ago) got the iPhone 5 and we're with tmobile. I know my brother has converted tmobile androids to AT&T before but I just don't know if you can do the sane with the apple iPhone 5.