EE is to hike prices up by 4.1% next month.
The telecoms firm is increasing costs in line with December’s Retail Prices Index (RPI) inflation figure from March 30.
The increase will affect all pay-monthly mobile and mobile broadband customers who joined EE or upgraded since March 26, 2014.
It means a customer paying £40 per month will see their bill rise by £1.64 per month.
An EE spokesperson said: “We go further every day to provide our customers with the UK’s best mobile network and great customer service, with 4G coverage in more places than any other operator.
“Like many service providers, our Pay Monthly plans increase by RPI annually, and this year customers on our most popular plan will typically see an increase of 85p a month.
“We’re currently contacting our customers to remind them this will take effect from 30th March 2018.”
Last year, EE pushed up bills by 2.5%, while O2 increased costs by 2.6%.
Then in April, Vodafone put up bills by 3.2% and Three announced a rise of 2.6%.