Hello & Welcome to Just Answer,
Sorry I didn't see your question earlier and to hear of the issue you are having with your phones.
May I ask:1) The Make & Model Number of the phone system you are working with?2) How many TOTAL handsets do you have with this system?3) The AGE of this system?
4) If you have any other symptoms with this or any other handset?
I see it has been a few days and I just wanted to follow up to see if you have any more questions concerning this issue or if the issue was resolved.
I look forward to any further questions or results that you may have.
Thanks, ***** *****