Welcome to the O2 Community

Has your question already been answered? See the community FAQ's
Level 1: Joiner
Posts: 1
Registered: ‎26-08-2019
Accepted Solution

UserID unknown

How do I block? User ID unknown calls.

Posts: 117,698
Topics: 576
Solutions: 16,542
Registered: ‎04-04-2012

Re: UserID unknown


The only way is to block all unknown numbers, ie you can't be selective.

Some phones have that feature built in to the phone app whilst others will need an app such as Truecaller.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
Posts: 84,711
Topics: 580
Solutions: 4,326
Registered: ‎04-01-2009

Re: UserID unknown

Which phone do you have?


It would normally be in your call settings and say something like 'block all unknown numbers'.

Level 70: Enigma
Posts: 17,382
Registered: ‎31-03-2010

Re: UserID unknown

@DrGuy  Blocking all unknown numbers can potentially cause problems. Doctors normally block their numbers.