Ok, so its not the best of mobiles, its not smart or clever, but it could be a nice emergency phone, or the kind of thing you take on a night out and can afford to lose for £1.99 on free next day delivery. It has a 12 month warranty. It is locked to 02 for 12 months which is a shame, but for less than £2 with a top up its not exactly bank breaking. It should though work with a £7.50 PAYG Tesco sim card given they piggya back 02.
no top up needed with O2