I'm thinking of joining Tesco mobile on a 12 month contract. Does anyone know what happens after 12 months - does my price plan stay the same in terms of what I pay and how many minutes, text and data I get? Am I no longer tied under a contract? Had a nasty experience with Vodafone where I joined and they then increased my tariff after 12 months claiming they had only offered me a temporary discount. Just want to make sure this doesn't happen again! Thanks