I have BT8600 with two handsets.
Both have worked perfectly until recently.
Now one of the handsets has no dial tone. Also when someone phones me, on that handset I can't hear the caller. Everything else on it works fine.
The other handset still works perfectly.
Is there anything I can do, or is the handset kaput?
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Sounds like the earpiece is defective, can you hear anything from that phone in handsfree mode
Its worth taking the batteries out for a couple of minutes, and then putting them back in, just in case the internal hardware has locked up.