iD Mobile vs O2: most-reported complaints compared
Most-reported issues at iD Mobile and O2, 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.
iD Mobile
TrustScore 4.2 · 71,656 reviews on Trustpilot.
1,595 reviews analysed, 2026-03-17 to 2026-09-25.
Complaint rate (recent window): 39%
100% of negative reviews get a company reply.
“I was tied into a sim contract that served no purpose”
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!!”
Reported on both
Issues with an evidenced category (at least two verbatim quotes) on both sides.
| Issue | iD Mobile | O2 |
|---|---|---|
| Poor core service | 47% | 27% |
| Support unhelpful | 25% | 51% |
| Support unreachable | 19% | 17% |
| Billing errors | 8% | 13% |
| Account/app problems | 8% | 16% |
| Overcharging | 6% | 8% |
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, iD Mobile or O2.