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(1)Download the firmware package from the given link and extract it.
(2)Verify that your SD card is formatted in FAT32 filesystem and has enough free storage.
(3)Unzip Download package or extract zip file.
(4)Now “dload” folder (containing Update.app file) put it to the main directory of your external SD Card.
(5)Next, turn off your device and insert the SD card.
(6)Reboot into forced SD upgrade mode by holding Vol Up + Vol Down + Power buttons at the same time until you see some text on the screen.
It’ll take a few minutes to complete the update. After that, it will automatically shut down and reboot into the new OS.
For more detail type on google how to update huawei via dload file.
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