Utility Warehouse fared best in the latest Ofcom complaints tables once again, while EE received the wooden spoon.
Some might say that the humble home phone has had its day, as many of us now opt for the convenience of mobiles to keep in touch instead.
That said, many households still need a landline to receive broadband, which is why many internet bundles come with one as standard.
But which providers should you go for and which should you avoid?
While price is obviously a key concern, reliability and the quality of service you can expect to receive should also be front of mind.
Before we look into the latest customer complaint trends from Ofcom, it’s important to flag that these figures only reflect the complaints escalated by customers to the telecoms regulator when the provider has failed to resolve the issue itself.
So, while these figures may look low, the total number of complaints filed with each provider will likely be far higher.
You can compare broadband, phone and pay TV deals with Sky, or ditch the landline and compare mobile deals with Carphone Warehouse.
Worst landline providers UK
Ofcom's latest data looks at all complaints received between the three months between April and June 2025, so it won't cover any recent major faults or issues that customers might have endured.
The report revealed that EE generated the highest number of complaints at eight per 100,000 customers – double the industry average.
Ofcom said most gripes from both firms related to 'faults, service and provisioning', suggesting many customers struggled with outages over the quarter.
Sitting just above EE in the complaints table was TalkTalk, which generated six complaints per 100,000 customers.
Best UK landline providers
At the other end of the scale, Utility Warehouse was the landline provider with the lowest number of complaints for the fourth quarter in a row.
In fact, the firm generated no complaints: for the first time, Ofcom reported a total of 0 official complaints against the provider.
Sky was the runner-up for the sixth quarter in a row – you can compare phone, broadband, and pay TV deals with Sky here (affiliate link) – with the company generating two complaints per 100,000.
Vodafone, Now Broadband and Plusnet were third with three complaints per 100,000, and the only other firms to come in under the industry average of four.
See below for the complete complaints league table, according to Ofcom.
Complaints to Ofcom per 100,000 landline customers
So, there you have it, your round-up of the worst (and best) landline firms.
If you'd like to find out which firms topped the broadband complaints list then head this way, while this article will highlight the worst Pay TV providers.