Online upgrade
If a new firmware is available and can be detected (with the M11S
connected to an available internet), an upgrade notification will show
up in the notification center. Tap on it to enter the update menu for the
online upgrade. If there's no upgrade notification showing up, you can
go to the "Technical Support->Firmware Upgrade" menu, and tap the
"Check for updates" icon to check manually.
Local upgrade
Also, the M11S can be upgraded locally by a firmware package.
Download the firmware package file from FiiO website, and copy it to
the internal storage of the M11S or an SD card. Go to the "Technical
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