While you wait for answers, we may have found some information which could help you.
Success
Message
How can I mend my BT4600 (1+1) phone?
BT Studio 4500 cordless telephone?
Problem with handsets?
How can i get my handset to speak with the caller?
BT 4600 twin one handset bot ringing?
TAM FULL on Binatone 1420 Single, base holds old messages th?
Bt 4600 phone?
BT 4600 phone problem?
My bt freestyle phone don't ring or con?
Battery cover?
How can I repair my phone?
How do i clear the TAM?