1. Each year, your Pay Monthly airtime tariff will be adjusted according to RPI+ (O2) or Consumer Price Index (Three & Vodafone) rate of inflation. Your bill will be adjusted in April by the rate announced in January (Three & Vodafone) and February (O2) that year plus 3.9%. Subject to pay monthly subscription, credit check and eligibility to selected network tariffs for a minimum term of 24-months. If you proceed, you will be redirected to the website of our trusted partner, A1 Comms Limited (trading as Mobileshop.com), to complete the purchase of your phone and set up your monthly plan. Your agreement will be with A1 Comms Limited, as well as your chosen network operator.