New iPhone 7 Plus has terrible signal
I just upgraded from iPhone 6 Plus to the 7 plus. I live out in the country but my iPhone 6 Plus always had at least 2 bars LTE. My iPhone 7 plus has no service throughout most of my house. It's awful. I am getting text messages hours after people send them and I have to have my phone pressed to a window to get signal. Phone is brand new and my software is up to date. There is also a brand new SIM card in this phone. What can I do to make this better?