Problem with agil pro

I am test driving the agil pro. This is my third pair because every pair causes my cell phone to drop calls. I like the size and I like the sound quality but the cell phone issue is really annoying for such an expensive instrument. Six phones, and three pairs of HAs later, I am still having this difficulty. Thoughts anyone?

Is the aid itself somehow physically pressing the hang-up (end call) button? It would seem to me that the electronic and/or computer chip of the aid would most likely NOT be the culprit, however I suppose ANYTHING is possible!

I say something physical is pressing a button.
Try using the phone in the normal manner with the aid nearby, but not touching the phone, does the phone hang up then?