Operation Manual
If you need some help, call us on 0800 145 6789* or go to bt.com/producthelp 
What happens when you block a number (caller)
You can block a whole number or part of it (e.g. you can block by 
area codes). 
To unblock or allow a blocked number, see page 27. 
•  A caller calling from a blocked number will hear a message telling them that 
their call has been blocked.
•  You’ll see the caller’s number (if available) in the Calls list with [Blocked call 
icon]. This means that BT Call Guardian is blocking the call without you 
having to do anything.
Remember: if you’ve blocked a contact, all the numbers you have for a 
contact will also be blocked.
Calls that are always allowed
‘Ringback’ calls and calls from the operator are always allowed, and you 
can’t block these using BT Call Guardian.
BT Call Guardian 25










