Zte Z958 - Upgrade Steps; Normal Upgrade Process

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the SD card, a tip is displayed on the screen: Can’t find update package
on storage card. Please confirm that update package has been copied
to root directory on storage card! See Figure 2-5.
Figure 2-4
Figure 2-5
5) Click UPDATE NOW, the device is automatically powered off. After the
device reboots, the Storage Card Update screen is displayed, see Figure
2-6.