Dropped calls on iPhone 17 Pro Max

Hi, Ive had a continuing problem with the iPhone 17 pro max.

The issue has involved dropped calls in the home where I live in the UK, I have contacted my network provider and been assured that there are mast or network issues.

I have had the iPhone 17 pro max replace on 2 occasions and the problem still persists, the last device was up to date with the latest software.

I have also tried a friends Samsung phone without any problems, my last iPhone 15 pro max didn't have any issue either.

Yesterday I ordered a iPhone 17 from Apple swapped the sim over and this phone worked perfectly well, no dropped calls.

Has anyone heard of this problem dropped the iPhone 17 pro max dropping calls.

It's important that I have a reliable device as I am disabled and don't have a home phone, I wouldn't have expected this sort of poor reliability from Apple.

Regards