The firmware 3.20.16 is now available for the Verizon MiFi 4620L device Verizon has a document http://support.verizonwireless.com/pdf/system_update/mifi4620l.pdf that describes the improvements. It includes a new data meter along with some fixes associated with dormancy mode...let's hope that it solves the issue where the device has sporadic issues simply powering off.
You can upgrade the firmware by logging into the web browser and checking for firmware updates.
Size: 653.51 KB
Estimated Install Time 1 minute 40 seconds
Description: MiFi4620L Upgrade from 3.20.11 to 3.20.16
Some previous documented shortcomings are here: