I'd like to switch, but after testing Verizon, AT&T, and Sprint (prior to the merger) with SIMs in my unlocked iPhone, none of them had reliable coverage at my

I'd like to switch, but after testing Verizon, AT&T, and Sprint (prior to the merger) with SIMs in my unlocked iPhone, none of them had reliable coverage at my house. T-Mobile was the only provider that gave me a good signal. I'm in city limits, so it's not what I expected, but I guess the problem is very localized.