Virgin Media O2, Three and iD Mobile were the most complained-about mobile providers in the UK during Q1, according to new figures published by Ofcom today.
EE, Sky Mobile, Tesco Mobile and Vodafone recorded the fewest complaints among mobile providers Three of course now falls under Vodafone Three
Ofcom’s complaints data, covered January to March, and shows that complaint levels across mobile services remained broadly unchanged from the previous quarter. However, theseO2, Three and iD Mobile stood out for generating the highest levels of customer dissatisfaction.
O2 customers raised concerns about how their complaints were handled, while Three drew criticism over billing, pricing and charges. iD Mobile received the most complaints about faults, service issues and provisioning problems.
A Virgin Media O2 spokesperson said:
“Six months after we drew a line in the sand and committed to improving our customer service, this data from the regulator shows real green shoots with overall complaints in the first quarter of 2025 down by 42 per cent year-on-year. Our more recent figures paint an even stronger picture, giving us confidence that our strategy of increased investment, simplification, upskilling agents and removing persistent pain points, is making a genuine and tangible difference in improving our customers’ experience with us. We’ll continue to make progress and get this right for good.”
Complaints about mobile services were steady compared to the previous quarter , in contrast to rising complaint volumes in the fixed broadband and pay-TV markets.
