The ZeTime has OTA (Over The Air) technology allowing you to update the firmware of your device through the ZeTime mobile App.
As soon as a new update is available, you will be alerted from the mobile App home screen 
.
Simply accept it in order to start the updating process.
Note: Before updating, make sure your phone and your ZeTime have more than 30% battery.
During all the update process you must keep your watch near your smartphone and your application must be open. Avoid using your phone during the update process
Below you will find a quick video about How to update my ZeTime?