PiPO M8 pro - Manual (Page 25)

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When hotspot is set up , there will be an icon appearing, like this, the
Wi-Fi signal is surrounded by a white square:
Ethernet: Turn on Ethernet, connect to HOST port via the OTG cable
which is included in accessories, and then connect this OTG cable to
the Ethernet cable.
Mobile networks: Turn on “Mobile Networks”→ “Data enabled”
whether you use a 3G dongle or SIM card, it’s required to turn on
“Data enabled” for mobile data transmission .