I travel all around the valley, and rarely ever have any signal issues with T-Mobile, in the places I do have issues Verizon phones are the only ones with signa

I travel all around the valley, and rarely ever have any signal issues with T-Mobile, in the places I do have issues Verizon phones are the only ones with signals. Where I live(Sun Dance) Verizon phones have little to no signal while I have 3-4 bars.