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