From April, we're increasing the price of your Airtime Plan in line with Feb's 7.8% RPI rate of inflation, seen in your terms.
EG: a £31 Airtime Plan would increase to £33.42 a month. Device Plans stay the same. Go to My O2 (app/online) in Apr to see your new bill.
More info: http://v.o2.co.uk/u4L7M9p7