iPhone X weak cell signal
I received my iPhone X on Friday and have set it up. While it's a fantastic phone overall, the cell reception *****. On my previous iPhones (4, 5s, & 6s) I had no problems in my apartment and could use the phone in any room. Not the case with iPhone X. I have no reception anywhere unless I'm sitting in the window where I get a single bar. This is absurd for the supposed most advanced cell phone. Is there a setting that can be changed to boost reception? I live in downtown San Francisco where cell coverage should be abundant. Any fixes would be appreciated.
iPhone X, iOS 11.1