Remember this about The Hub when connecting to cellular: it absolutely loves windows! They help it connect to its built-in cellular service. However, this option is meant for initial installation and as a backup in case your home Wi-Fi is down or the location is remote.
Otherwise, connecting The Hub to your home Wi-Fi will always be a better choice (unless you can connect via Ethernet, that’s the one we like the best). We added some super cool antennas to your Starter Kit that will improve your cellular connectivity!