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Luoran M4 - FM Radio and App Management

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available USB port by using a proven USB cable.
If the fault persists, it means the USB port of
the player has been damaged.
Check if the USB cable is damaged.
You can replace a proven USB cable to connect
the player to check if the connection can be
restored. If it can, it means that the previous
cable has been damaged.
You can also try to use the USB cable to
connect to other devices. If there is also no
response, it means also that the USB cable has
been damaged.
FM radio cannot be turned on.
Usually, you need to connect a wired headset
to use it as an antenna. In addition, the
playback effect of FM Radio will be affected by
the location and the strength of the signal.
Troubleshooting:
The FM radio needs to be plugged into a
wired headset/headphones as an antenna to
turn on. If the headset is plugged in and the
fault persists, it is likely that the 3.5mm port is
in poor contact. Please replace one headset
and try again.
I want to delete some unnecessary apps,