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I was able to access this upgrade from the JBL website: http://www.jbl.com/content?ContentID=everest-app#/where-to-download/
Sorry, there was a problem. Please try again later.For headphones with Version 4.0 of the Firmware, the first update will be done via USB cable, and after the first update, all subsequent updates will be delivered over the air. For headsets with version 5.0 of the firmware, all updates will be delivered over the air, via the app Was this helpful?
Sorry, there was a problem. Please try again later.Firmware download is available, just updated mine. Be Warned, only use the Windows version (v 1.2) with windows 10. OS X version will render the headset unable to power up (version 1.1 - can be rectified with the windows version as indicated above) download from http://www.jbl.com/content?ContentID=everest-support
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