According to the Dutch company – Skins Mobile (and I guess not only according to them), your mobile phone is in constant danger from dirt or moisture. And, you should protect your trusty companion.
However, Skins Mobile suggest kind a strange solution. Basically, they are offering a new brand of phone condoms to protect the mobile phones. This “device” works quite simply, all you have to do is to slip it over your phone (whether it has a brick or a clamshell form factor) and voila, it’s protected from dirt or moisture. (via: Mad4MobilePhones)