O2, EE, Vodafone and Three down customer rankings due to price hikes, Which? finds

Mobile phone users are being hit with “shocking” mid-contract price hikes by the country’s biggest networks when they could be getting better deals and strong service elsewhere, according to an influential survey.

The “big four” network giants O2, EE, Vodafone and Three were outperformed by smaller firms in the annual survey of best and worst mobile phone providers by consumer group Which?.

Consumers could be finding better value and good service with smaller virtual networks like Smarty, Giffgaff and Tesco Mobile, Which? argued.

Best mobile phone providers

According to Which?

1. Tesco Mobile
2. Lebara
3. Voxi
4. Plusnet Mobile
5= Giffgaff
5= Smarty
7. Utility Warehouse
8. iD Mobile
9. Sky Mobile
10= EE
10= O2
12. Vodafone
13= BT Mobile
13= Talkmobile
13= Virgin Mobile
16. Three
17= Asda Mobile
17= Lycamobile

The survey of 3,400 mobile customers – which represents a small proportion of its customer base – found Three scored the lowest out of the “big four”, with a customer score of 66%.

Customers were the most likely to experience problems, including poor phone signal, network dropouts and problems resolving queries.

Vodafone fared slightly better with a customer score of 68%, receiving good ratings for network reliability and download speeds, but rated poorly for customer service and incentives despite offering perks like giveaways and cheap cinema tickets.

O2 and EE both scored 69% with “mediocre” scores across the board, but Which? noted O2 implemented the highest mid-contract price increases at 17.3% on parts of some customers’ bills.

Giffgaff was among the smaller virtual networks to receive a higher customer score in the Which? annual survey. PA Media

On the other hand, Tesco Mobile flew to the top of the rankings with a customer score of 80%, while Giffgaff and Smarty were rated highly for value for money with scores of 75%.

It comes as the UK’s biggest providers were among those who pushed ahead with price hikes of up to 17% in the middle of people’s contracts earlier this month, as living costs soared for households.

The move left “millions caught in a Catch-22 where they either have to accept costly fee hikes or pay exorbitant fees to leave early”, Which? said.

Watchdog Ofcom is in the midst of a review into inflation-linked price rises, with initial findings set to be published later this year.

“At a time when household finances are already under significant strain, it is vital for customers to have sufficient certainty about the prices they will pay over the course of their contract,” Ofcom said.

Rocio Concha, Which? director of policy and advocacy, added: “Which? believes it’s absolutely critical that Ofcom’s review of inflation linked mid-contract hikes results in changes that ensure customers are never trapped in this situation again.”

In response to the cost-of-living crisis, Which? said it has begun endorsing mobile phone providers which offer outstanding value for consumers wanting a cheap and useful amount of data.

Smarty, Giffgaff and iD Mobile all met the criteria for offering cheap sim-only deals.

But Tesco Mobile was stripped of its recommended provider endorsement despite being the highest scoring network.

This is because it has begun “baking above-inflation price increases into new customer contracts despite previously championing fixed prices”, Which? said, with price hikes starting from April next year.

Mobile providers have been contacted for comment.