Call Issues: Only every other word is heard by other person. It's driving me nuts!

Hi everyone,

I’m hoping someone can help or point me in the right direction.

I have been a proud Fairphone 3+ owner for about 5 years now and never had any problems with telephone calls until the past couple of months.

Not all the time, but every now and then I have the other person complaining that they can’t hear me properly. In fact they only catch every 2nd or 3rd word.

It has happened when trying to speak to my wife and my dad but mostly it is calls to/from the doctors surgery, the bank and callers that seem to be using 0300 numbers or VoIP lines. It’s a nightmare because usually involves me trying to give DOB or numbers down the phone with every other number being missed!!

Could this be their issue (no-one with other phones seem to have this issue)
Could it be a hardware issue at my end? If so, should I try replacing a module? Which one?
Is it a signal issue?

I just can’t work it out.

(I’ve just bought a pair of Fairphone TWS Earbuds and so I will explore whether this happens when calling while connected to headphones. Will update)

Any help would be really appreciated.