Frequently Asked Questions

O2 & Vodafone - Malicious Calls and SMS
We know that receiving malicious calls and texts can be extremely distressing. However it's important to remain calm and consider the following advice.

Malicious, abusive or threatening calls, whether from people you know or from strangers, are a criminal offence.

If the caller is making direct threats to you or your family and you believe those threats to be real and immediate, call 999 straightaway.

If you believe that the threats made are not immediate, then you should call your local police station on 101 from any landline or mobile.

In both instances, you'll need to provide the police with all the relevant information including:
  • the numbers that have contacted you
  • what was said or sent
  • dates and times of calls and texts
  • if you know the people doing this.
The police can then decide what course of action to take against the offender(s).

To stop the calls you may wish to change your mobile number – contact us and we'll help you with this.

We're not able to block calls for you. However, some phones can do this, so check your handbook.

If the phone numbers are being withheld, the police may advise you to contact us and we'll arrange to trace the calls. This information can then be sent to the police (and only the police) to assist your case. As well as speaking to our Malicious Calls team over the phone, you can also email

You'll need to send us:
  • your name and number
  • a description of the calls or texts
  • dates and times you received them.
We'll then be in touch as soon as we can.

Silent calls can often be mistaken for nuisance or malicious calls, but can sometimes be from large call centres. Register with the Telephone Preference Service (TPS) before you consider changing your number or contacting the police.

If you need more advice, take a look at the Ofcom guide on how to deal with malicious calls:

 Last updated 07-06-2021 8:24 am

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