Is mobile internet coverage reliable in remote areas of Namibia like Sossusvlei or the Skeleton Coast?

Coverage in Namibia is strong in cities like Windhoek and Swakopmund, and along major travel routes. However, in extremely remote areas such as the deep desert of Sossusvlei or parts of the Skeleton Coast, service can be intermittent or unavailable. It's wise to download offline maps and inform someone of your itinerary as a backup.