While most people around the world are still waiting to get 5G access, T-Mobile and Metro are back with an accessory for their 600 MHz LTE network. The Coolpad Surf hotspot is capable of connecting up to 15 devices simultaneously and its 2,150 mAh battery can last for up to 5.3 hours of continuous use or 48 hours on standby.
https://www.notebookcheck.net/Coolpad-Surf-600-MHz-LTE-hotspot-now-available-via-T-Mobile-and-Metro.401171.0.html