best O2 5G mobile phone deals

^† RPI+/CPI Price Increase - Each year, your Pay Monthly airtime tariff will be adjusted according to O2’s RPI price increase model, RPI+. Your bill will be adjusted in April by the RPI rate announced in February that year, plus 3.9%.

^* Next-day delivery subject to availability and acceptance. 1-month free insurance subject to opting into mobile phone insurance, cancel any time.