The TTfone TT20 4-inch Android Smartphone is modern technology at its very best, with its DUAL SIM standby option it is the best choice for buyers of budget high tech smartphones with free SIM card.- It does not come with a mains charger, it is sold separately.- Unlocked - simply insert your existing SIM card, can be a Pay As You Go or contract SIM (except the Three, ID and Smarty network).