What is the CoreESIM internet coverage like at Rainbow Mountain (Vinicunca) in Peru?

CoreESIM connectivity at Rainbow Mountain (Vinicunca) in Peru is generally available at the lower elevations and primary staging points, often via Claro or Movistar networks. This allows for initial communication or navigation. However, as hikers ascend towards the high-altitude summit of Vinicunca, the cellular signal will likely become intermittent or completely absent due to terrain obstruction and remote infrastructure. Plan for offline access to maps and essential information.