The TP-Link M7650 is a small battery-powered router that can take a single 4G mobile connection and distribute it to up to 32 other devices over WiFi.
https://www.techradar.com/pro/phone-communications/tp-link-m7650-cellular-router-review
https://www.techradar.com/pro/phone-communications/tp-link-m7650-cellular-router-review