Signal strength in my home/environs is poor. I get one bar, sometimes two. Phone calls lose audio but remain connected. Phone says I'm running LTE. I've gotten a new SIM card, reset the phone. Changed sim settings to LTE and CDMA from global mode. Works better at night.
My family has iPhones. They get plenty of bars, can walk everywhere in the house and never lose a call.
I can get five bars of signal when I get out of my neighborhood.
Thank you!