To install the update, you only need to launch the Spark application on your computer, smartphones or tablet. (Computer is preferable for more stability)
When there is an available update, you will see the screen as below, just click on "install update"
The next steps will be:Downloading
Extracting and validation the update
Installing the update
if you are blocked on one of the steps above, you only need to close the Spark application and relaunch.
if after the update your Phantom doesn't play any sound, just unplug electrically and replug your Phantom to solve the problem.