EE will increase the monthly cost of its customers' phone bills by 2.7%, in line with inflation.
Subscribers on EE, Orange and T-Mobile will be affected by the price hike, which comes into effect from May 28.
Additional charges for usage beyond customers' monthly allowance will also increase.
As the price rise is linked with inflation, customers are not able to cancel their contract early, unless they joined or upgraded after January 23.
The network has warned that those who signed up or upgraded within the last 30 days may still receive a letter about the move but will not be affected by the changes.
"We know price rises are never great news, but we work hard to keep costs down while offering our customers great value on the UK's biggest and fastest network," EE said on its website.
"As a result of rising business costs, we are increasing the price of EE, Orange and T-Mobile monthly plans."
Subscribers on EE, Orange and T-Mobile will be affected by the price hike, which comes into effect from May 28.
© Rex Features / Ray Tang
Additional charges for usage beyond customers' monthly allowance will also increase.
As the price rise is linked with inflation, customers are not able to cancel their contract early, unless they joined or upgraded after January 23.
The network has warned that those who signed up or upgraded within the last 30 days may still receive a letter about the move but will not be affected by the changes.
"We know price rises are never great news, but we work hard to keep costs down while offering our customers great value on the UK's biggest and fastest network," EE said on its website.
"As a result of rising business costs, we are increasing the price of EE, Orange and T-Mobile monthly plans."