(Tip: The original firmware is a separate ZIP file. Because of the upload limitation of, it is divided into multiple compressed packages. So after downloading and implementing, you need to decompress it first, and then compress it from scratch into a ZIP file. 1. Decompress the file from the beginning to ZIP format. 2. Put the downloaded files in the root directory of the memory card. The phone has enough power. Shut down the phone and install the memory card. Press and hold the volume plus key the power on key to enter the flash mode. Select the second power on key to acknowledge that it is 100% OK when you select the flash file of the memory card)
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