iPhone 7 Dropping Calls Intel Modem

I've done some research and it looks like the iPhone's with the Intel modem are poor performers. Is there a fix for this??

I've had multiple iPhones over the years and never had an issue talking in my house/car, except for a few known drop areas, but ever since I got my iPhone 7 I can't even make/take a call from inside my house! It's really frustrating because I'm constantly dropping calls, no matter where I am. AT&T has been no help, swapping it to data only for LTE helped slightly, but still dropping calls randomly. I unfortunately have the iPhone 7 A1778 (Intel Modem)

Any ideas or solutions from Apple on the poor modem?