Cheapest Mobiles There are now many contract mobile deals in the UK that can fit all kinds of budget. Everyone, from students to professionals, can now afford to have a contract phone today. If you are one of the tight of budget or you don't think that spending almost £40 of monthly mobile phone tariffs is reasonable, you can choose to get the cheapest mobiles around. The monthly tariffs are low on these cheapest mobile contracts but another great thing about them is that most of them will come with a free handset.