First, you need to be ready the ZIP of local OTA upgrade on the U disk;
then, connected to it with your BOX, findout the APK you want to upgrade from desktop: Settings>>About>>Update. You will find the following upgrade interface.
You can findout your U disk through selecting the Local update, and findout the ZIP of OTA upgrade of you selected. After finishing the copy, you will allow to Update through the lower right corner.
Please note again: DO NOT turn off your power during the process of upgrade, or you have to recover by flashing.
Sure, you can also upgrade through online if there is the latest version onine.
When a new version pushed, system will pop up a dialog of upgrade when online, after the boot into the system about 30s, and show it on your screen; at this moment, you just need to press OK, it will automatically enter the interface of download the Update and download the zip of upgrade. Finishing downloading, it will start automatically updating when you select Update again(It also needs to keep turn on, and it will enter the system automatically after finishing upgrading.)
If you don’t want to upgarde now, you can upgrade later through Settings >> About >> Update >> OnlineUpdate.
The following is a complete system after finish flashing, entering to check,Settings>>About>>Update>>OnlineUpdate. Congratulatons! It shows the latest version.
That’s all. You might have a try.