What is the expected DataESIM internet coverage within the Jersey War Tunnels?

DataESIM users will experience strong 4G LTE signal at the entrance and visitor center of the Jersey War Tunnels, facilitating pre-visit research or immediate post-visit sharing. However, due to the inherent physical structure of the deep underground tunnels and concrete fortifications, cellular signal will naturally be lost while traversing the main exhibition areas. Connectivity will resume automatically upon exiting the underground sections, ensuring reliable data access for the majority of your visit to this historical site.