My mother-in -law has got a BT4600 twin, both handsets are faint for dial tone and reception, brought base station and one handset to my house to try same problem, both handsets ok on loudspeaker any suggestions,
Phones were bought )ct 2016.
Welcome to this user forum.
Possibly a faulty base unit, perhaps it has been situated in a damp area, and moisture has got inside?
On the handsets, there is also a volume control up/down (centre) on the front, has that been turned down by mistake, there is also an amplify button on the side.
After many hours messing about I've come to the same conclusion.
She has the base station on a small table under her window and I've a
funny feeling water from her plants has maybe got onto the base station.
Wouldn't mind but feel a bit stupid not thinking about this in the first place seeing as I was a TO with BT
for over 30years.
That would certainly upset it. Its the only common thing that would affect both handsets.
If you replace it with a single base and phone, you may be able to pair the existing handsets with it.