Do we really need another smartphone OS to contend with iOS, Android and Windows Phone? Anyway, for just £60, the ZTE Open Firefox-powered phone might be worth a punt, maybe? Strangely, it's exclusively being sold by ZTE on eBay; that's where phones go to die, right?
There are a few drawbacks to the ZTE Open, things like a crappy 3.5-inch 320x480 pixel screen, a 1GHz CPU with just 256MB of RAM, and only 512MB of storage on-board. Thankfully, there is a microSD card slot, and 3G (yep, no LTE here).
Maybe it'll make a great festival phone? [eBay]