The patch to upgrade from 4.2.1 to 4.3 is available. If you would like to get this patch and if you are running 4.2.1 (Build 4210 and Build 4211), please send us an email to email@example.com. We will send you instructions on how you can access this patch.
To check your build, open WiFi Manager Web Client. Click on ?About? link on the top right corner. The Build Number will be listed in the new window.