Trending: Who you gonna call? Lost property!

Mobile phones are the things that we lost most of (Getty Images)

Are mobile phones the new socks? (Bear with me on this.) It used to be that socks were the things we lost most of, because there are two of the blighters to keep track of.

Then there's the old favourite, keys, because you put them down as soon as you get home and are distracted by what riches lie in the fridge. Glasses, because you can't see where they are.

But top of the lost-property pops these days, it seems, are mobile phones, with figures from mobile security firm Lookout suggesting that Americans lost $30bn-worth last year. Zoiks.

So now phones not only let us make movies, check share prices and read novels, they've also given lost socks a run for their money.