People who call directory enquiry services will be protected from sky high prices, thanks to a price cap on 118 phone numbers from 1 April.
Industry watchdog Ofcom said it's introduced new maximum rates to protect vulnerable customers from rip off charges.
Its research found some companies have charged almost £20 for a 90-second call to these services, with a 90-second call to the most popular service, 118 118, previously charged at £11.23.
Cheaper services are available, but Ofcom said consumers tend to use the ones they most easily remember.
The number of calls to 118 services has been falling by around 40% every year, but more than a million people in the UK still use them. Many of these people are elderly.
Broadband customers can now get automatic compensation when things go wrong
Every year, around 450,000 people pay a combined total of £2.4million more than they expect for these calls, with some struggling to pay their bills.
From 1 April, the maximum cost a 118 service can charge will be £3.65 per 90 seconds.
This, Ofcom said, will bring prices back to the levels they were at in 2012, and closer to what people have told us they expect to pay for using these services.
