Which non-contract phone company works best in Tride

An international friend is coming over… If he was to get a “no contract” phone which company has best coverage in Telluride?

have them try calling:

San Juan Cellular Inc
224 E Colorado Ave # F, Telluride, CO 81435

(970) 708-1426 ‎

:peace

If it’s their first Telluride, wouldn’t a ‘Virgin Mobile’ be appropriate?

Also - I seem TP remember Verizon working well there.