10. How to upgrade the M9?
A: The M9 supports online upgrade. If a new firmware is available and detected (with the M9 connected to Internet), you will find update notification in the notification center. Then you can click on it to enter the update menu for online upgrading.
Also, the M9 can be upgraded locally using firmware package:
a) Dwonload the firmware file from FiiO website then copy the firmware package file to the micro SD card;
b) Open "Technical Support" app on the M9, click "Firmware Update", and select the firmware package file to upgrade.
Note: A micro SD card is also required for online upgrade, otherwise it will fail to download the firmware online. And there is no special requirement for the format of micro SD card when upgrading the M9.