020 8153 3803
Also shown as:
- 020 8153 3803
- +44 20 8153 3803
AI Summary
Based on 6 community reports
This London number is generating extremely high spam activity with callers impersonating major UK mobile networks including O2, EE, and Vodafone. The scam follows a consistent pattern: callers claim your SIM card will stop working within two days and pressure you to "upgrade" or accept a replacement, typically demanding personal details or payment in the process. One caller even panicked when told the recipient worked in scam protection, hanging up immediately. Reports mention the caller didn't sound British, which is another common indicator. O2 has confirmed these are fraudulent calls. Never engage with unsolicited SIM upgrade demands — legitimate networks don't contact customers this way about urgent SIM changes. If you receive a call like this, hang up immediately and contact your provider directly using the number on your bill or their official website to verify any genuine account issues.
6 verified reports
Cumulative spam score based on all reports up to each month. Higher percentage means higher reported scam risk. Cumulative spam score based on all reports up to each week. Higher percentage means higher reported scam risk. Cumulative spam score based on all reports up to each day. Higher percentage means higher reported scam risk.
Most helpful reports
6 totalSaid they were from O2 and my SIM would stop working in 2 days, I told them I work in O2 scam protection (I don't) and they hung up faster than an outlaw in the wild west.
The caller didnt sound British
Called and told me my ee sim will not work in 2 days !!! A scam for sure
Said they were calling from Vodafone and that my SIM card would stop working in 2 days because I had to upgrade it and they needed to send me a new one.
Said they were from O2 and my sim card would stop working in 2 days
Said they were from O2 telling me I need a new sim card because they were merging with Virgin Media. I hung up and called O2 who confirmed it was a scam.
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About 020 8153 3803
What type of number is 020 8153 3803?
The phone number 020 8153 3803 (also written as +44 20 8153 3803) is a UK landline number originating from the London area in Greater London . Calls to this number are charged at standard UK landline rates, usually included in call packages.
Is 020 8153 3803 safe to answer?
Based on 6 community reports, this number has been frequently reported as spam or a potential scam. The current risk score is 95% with 5 reports marking it as spam .
Exercise extreme caution if you receive a call from this number. Do not share personal or financial information.
More on nuisance calls
Safety Score
Details
- Tel Number
- 020 8153 3803
- Country
- 🇬🇧 United Kingdom
- Network
- Voiceflex
- Area
- London
- Type
- Geographic
- First Seen
- 27 Jan 2026
Protection Guides
How to Block This Number
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Caller ID Spoofing
Scammers can make any number appear on your phone, including your bank's real one. How spoofing works, how to spot it, and what to do if your own number is being used.
Report to Ofcom
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Location
London, United Kingdom
This number originates from the London area code region. The map shows the general geographic area, not an exact location.
Call Types
Breakdown of reported call reasons. Larger segments and bars represent a bigger share of reports.
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