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How to update firmware?

The step of update frimware:
Step 1:
Downloads the file:

Step 2:
Unzip the file ,you will get 3 files and copy them to root folder of your SD Card. Insert the SD Card into your stb after you have removed power from it.(it must be sd card instead of USB driver)

Step 3:
Insert a toothpick into the A/V port on the back of your Devices. Feel for the button hidden inside of the port. Press this button using the toothpick and
plug the power back in, while holding this button. After 30 seconds release the button.

Step 4:
Then you should see Android sign with the update wheels spinning.

Step 5:
Please wait for 10 minutes after system reboot , It will install all apks.

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