It comes as broadband and mobile providers have been banned by Ofcom from using mid-contract price rises that are linked to inflation - instead, customers must now be told in "pounds and pence" how much their contract will rise by each year.
The Sun reports that up to one million Sky Mobile customers are out of contract and will therefore see their monthly bill increase.
To ensure we can continue to invest in our services and deliver a great experience, the majority of our out of contract customers will see their monthly bill increase by £1.50 in February.".
The price of calls to the EU and EEA will rise by 4p to 25p per minute, while calls to the rest of the world will increase by £1 to £3.50 per minute.
International Saver Plan customers will see a price rise of £1 to £4 per month.
