The 1006.0 firmware update using SmartThings app on iphone, shows 0% for ever.
Updating via usb stick is not possible, because the soundbar has a mini-usb port (?????).
The update file and install guide are available from this Support Link. You will need a USB-to-USB Micro adapter to connect the sound bar.
I've been having the same issue.
What's the point of having the SmartThings app to update products if it doesn't work for its intended purpose and you have to go out and buy a cable to use a USB to update a soundbar that is advertised as having wifi and automatic updates.
The newest v 1017. Firmware updated via USB fixes this issue.
I had a 1 second delay in sound when changing channels or input sources, that issue has resolved. Updated mine today.