Regardless of the town I wouldn’t tell anyone you are building an outhouse. Rent a port-a-john until you have a septic put in.

I did a trial and had zero service most places in rural-ish central vermont with an iphone se2.

Red pocket and verizon prepaid (the nvmos i've used) worked much better - but since then i've switched to verizon postpaid. I decided that meets my needs better despite being 3x the price. Though AT&T may get slightly better service where I live.