Connect the MiFi to the computer via USB cable then turn on the MiFi.
The computer should automatically detect an update, if presented click Yes.
To start the update manually, click Options > Upgrade Firmware. If Upgrade Firmware is not listed, there is no update available for your device.
To view the current firmware version, click Diagnostics.
To continue installation, review the License Agreement, select I agree then click Next.
The installation takes a few minutes.