W52P outgoing calls

[Indus]

Hello Support Team,

Since one week I have a strange problem with my W52P headset / Telephone line.

I am using easybell number in Germany. When I make outgoing calls the person on the other side cannot hear me and I cannot hear them too. I tried another telephone with another number, eg Mobile phone and things are okay.

Not all outgoing calls are a problem. Certain numbers do work eg. the hotline number of easybell. We had several conversations in the last one week.

Incoming calls are no problem.

I am able to make calls over the same handset through my Dialnow credits. Here everything is smooth.

My provider Easybell has check the lines from their sides and has decided that the problem is in my handset, which I don't believe.

Can you let me know what I can do to make sure that the problem is not the Handset? Any type of check or update??

Regards
Brijesh