To update your ZeBuds' Firmware, first download the MyKronoz App.
Open the MyKronoz App and sign up (if it is your first time) or log in with your account, then tap on the settings icon on the top right corner of the app and select "Paired Devices". Click on the big + on the bottom of the page and select ZeBuds in the list of device. Follow the instructions on the screen to pair your ZeBuds Premium to the MyKronoz App.
Please make sure you ZeBuds Premium are well charged, out of the charging case and in Bluetooth range.
Depending on your the model of your smartphone and ZeBuds Premium, different manipulations will be necessary.
If un update is available, you will see an orange button next to ZeBuds Premium under the "paired devices" section or a big red banner on the main screen of the app. Simply click on the update button or banner and follow the instructions on the screen.
The update will take a few minutes and will update one ZeBud at a time. Once the update has been successfully installed, the MyKronoz App will prompt you to pair your ZeBuds Premium once more.