I believe a quality VHF (2M) radio with good properly installed antenna will provide substantial communications capability around most of the continent. We planned on relying on 2M for our emergency communications needs on our journey up British Columbia and even through the Yukon Territory and into Alaska before COVID hit..... It would have had far Better coverage than cell phones. Another option is one of the two satellite system texting options with appropriate plan. As a bit of a Prepper, I keep a Garmin Inreach device on hand with a monthly plan.