Scam/Fraud
6 months ago
Phoned and claimed to be from O2, hung up when I said I was no longer with O2.
Community overview
Community rating:
Negative
6 user reports
First reported 3 Mar 2026
·
Last reported
6 months
ago
About this number
Number formats
- UK format: 020 8081 5931
- International: +44 20 8081 5931
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020
Reported categories
Based on 6 public user reports
Scam/Fraud
67% (4)
Telemarketer
17% (1)
Unknown Caller
17% (1)
User Reports (6)
Scam/Fraud
6 months ago
They claimed they were o2 and needing to give me a new SIM card, when I asked if could have verification through email they said they have been sending them but I haven’t responded and asked me to verify email address, I asked them to read out the email they have in folder and they hung up
Scam/Fraud
6 months ago
Claimed they were sending a new SIM then asked for my email. I said you should have that so no. She hung up. Dodgy.
Scam/Fraud
6 months ago
Claimed to be from Tesco/O2 and that they were sending me a new sim card. I knew immediately it wasn't Tesco as they would not give me a straight answer when challenged. Also I have an eSim, not a physical sim card, so definitely not the case that I need a new sim card.
Unknown Caller
6 months ago
Claimed to be from o2 regarding a new sim.
Telemarketer
7 months ago
EVERY MONTH OR TWO
Report this number: 020 8081 5931
↑ Back to reportsDid this number contact you?
You’ve already submitted a report for this number.
Your report may still be going through moderation before it appears publicly.
Your report
How did they contact you?
How would you describe the contact?
Please do not include full names, private addresses, or abusive, hateful, or defamatory content. Please read our Community Standards before posting.
Thank you. Your report has been received.
Before appearing publicly on the site, reports may be reviewed and checked as part of our moderation process.
How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 8081 5931 and tap the info icon (i)
- Scroll down and tap Block this Caller
- Confirm by tapping Block Contact
On Android
- Open the Phone app and tap the 3-dot menu
- Go to Call history or Recents
- Long press on 020 8081 5931
- Select Block number or Block/report spam
On Landline Phones
Several options are available for UK landlines:
- BT Call Protect - free for BT customers
- TalkTalk CallSafe - free for TalkTalk customers
- Call blocking devices like CPR Call Blocker (available on Amazon)
Register with TPS (Telephone Preference Service)
The TPS is a free service for UK consumers that allows you to opt out of unsolicited sales and marketing calls.
Learn more about TPS registration