Strandbutler has developed a digital beach chair rental system. It uses a smart lock attached to the chair that incorporates Telekom’s nuSIM technology, which provides a reliable cellular connection. Vacationers can use an app to book and pay for a beach chair and unlock it on the spot with their cellphone. Beach chair rental operators use Telekom’s cellphone network to manage their business. If there is a problem with the lock they can open it remotely. The nuSIM is built into the communication chip, making it more compact, with a longer battery life and improved resistance to harsh weather conditions. Locks can also be located precisely by means of GPS satellite positioning.