O2 vs Tesco Mobile UK: most-reported complaints compared
Most-reported issues at O2 and Tesco Mobile UK, according to reviewers on Trustpilot — classified by our automated reader and backed by verbatim quotes from distinct reviews. This is a side-by-side of what reviewers report, not a score, rating or recommendation for either company.
O2
TrustScore 2.8 · 25,271 reviews on Trustpilot.
1,078 reviews analysed, 2026-06-09 to 2026-09-26.
Complaint rate (recent window): 39%
31% of negative reviews get a company reply.
“Received a letter asking for £16 on an account that we had cancelled, saying debt collectors would be sent!!”
Tesco Mobile UK
TrustScore 4.2 · 92,097 reviews on Trustpilot.
3,134 reviews analysed, 2026-04-09 to 2026-09-26.
Complaint rate (recent window): 24%
79% of negative reviews get a company reply.
“I had a bill of £47 yet £202 was taken from my account.”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | O2 | Tesco Mobile UK |
|---|---|---|
| Support unhelpful | 51% | 40% |
| Poor core service | 27% | 25% |
| Support unreachable | 17% | 10% |
| Account/app problems | 16% | 17% |
| Billing errors | 13% | 6% |
Method: reviews are classified into a fixed complaint taxonomy by an automated reader; every category shown is backed by at least two verbatim quotes from distinct reviews. Figures are census classifications, not official statistics, and reflect what reviewers reported — not findings of wrongdoing by either company. Not affiliated with, endorsed by, or sponsored by Trustpilot A/S, O2 or Tesco Mobile UK.