7.What can be done if I forget my password? How to enter recovery
mode?
Turn off the device first. Hold the pause/play button and plug a USB cable in for
power supply. It will enter recovery mode after turning on. On the display,
choose "Wipe data/factory reset->Yes until it finishes. Then choose "Reboot
system now" to start the device.
Notes:
1. Choose menu: use the volume buttons or previous track buttons
2. Confirm: short press the power button
Firmware upgrade, factory data reset and technical support
1.How to upgrade firmware?
The M15S supports online upgrade and local upgrade.
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