Is there reliable signal with Truly Roaming at the Salar de Uyuni (Salt Flats) in Bolivia?

When visiting the Salar de Uyuni, Truly Roaming will provide signal in the town of Uyuni and around the "Train Cemetery." This allows for initial coordination or quick uploads. However, once you venture out onto the vast expanse of the salt flats themselves and during multi-day jeep tours to the colored lagoons, expect coverage to be extremely rare. This remote environment is a fantastic opportunity to disconnect, so plan for offline navigation and communication during your tour.