https://www.t-mobile.com/coverage/coverage-map claims that T-Mobile has 4G LTE coverage on the Colby campus and nearby areas in Waterville, Maine.
Here are the coverage maps for Verizon, AT&T, and Sprint:
https://www.verizonwireless.com/featured/better-matters/?map=4glte#maps
https://www.att.com/maps/wireless-coverage.html
https://coverage.sprint.com/IMPACT.jsp