I was looking into a device to use for on-call, intending to get a "dumb phone" that was a trade for a long battery life and a small form factor in exchange for

I was looking into a device to use for on-call, intending to get a "dumb phone" that was a trade for a long battery life and a small form factor in exchange for only being able to call and text (which is all I would need anyway for on-call). A lot of "dumb phones" no longer work in the US, or are on the way out. The Punkt MP02 is one of the exceptions that has the specs I want and has 4G support. Unfortunately, while I am sure it is worth every penny, I couldn't afford the $350 price tag.