The Sony Ericsson Xperia X10 mini, the world’s smallest Android phone, has gone on sale in the UK at Carphone Warehouse on Saturday.

Those willing to go miniature at any cost will be able to snap up the new model for free on a £15 a month contract (over 24 months), or simply pay £199.95 for a Pay As You Go version.

In an attempt to lure you to the Carphone Warehouse compared to anywhere else that might be selling it, the handset will come with three interchangeable back covers in black, pink and silver.

The Sony Ericsson X10 mini is just the size of a credit card and weighs in at just 88 grams, suggesting that you might lose it if you're prone to misplacing small things.