Thank you for your post and welcome back to our community forums. We're here to help.
I am so sorry to hear you're having some caller display issues recently. Are you having any other problems with the landline service? Along with this, have you checked our Service Status page yet for any known area impacting faults that may be causing this?
Re: Caller Display stopped working - please reinstate
Thanks for checking it is switched on, Sofia.
I haven't changed the handset for years. It is a corded phone (which is what I need). It has a factory reset so I have pressed that. I doubt it will help but it is worth a try. I am expecting a call on Sunday so we'll see if it works.