Use the Bobcat Diagnoser
Bobcat OTA's will automatically update your firmware, but you can always use the Bobcat Diagnoser to confirm your hotspot is operating with the latest firmware version.
Once you access your Diagnoser, you will be able to locate your Bobcat OTA version displayed at the bottom of the Diagnoser menu. Your Helium firmware version can be located by selecting the Miner (5s) feature.
You can view the latest OTA by going to this page.