How would I go about doing this? I think it's an iPhone 4 and it has a passcode set so I can't access any of the contacts. I found the iPhone on the airplane but I didn't want to give it to the airport because of a documentary I watched a while ago about how many of them just take the item rather than returning it. The iPhone is also not connected to any network (the Sim Card's AT&T but it isn't connecting to any network here in the UK so I can't make any calls- it doesn't seem to accept my Sim card either). What should I do with the iPhone?