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Figure 7 Download the version
Step 3: make sure the download pattern is “Firmware Upgrade”, press the device’s “Volume +” key, and
then connect the android device after power failure with the computer through USB. When the
download ok dialog shows up, it means the download of secro-sign.img has been completed.
Remember never use the Format pattern to download versions. All download patterns are shown in
Figure 11 as additional information.
Figure 8 Download patterns
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