PiPO M8HD - Manual (Page 15)

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Note: After pairing, it shows under the Bluetooth device ―Paired but not
connected‖, but file transmission is still possible.
You can see the received files by touching the right corner icon. At present, the
Bluetooth function only supports files transmission.To extend battery life, turn
Bluetooth power off when not in use.
3.3 3G Network
3.3.1 External 3G Network
A 3G network is a mobile network that allows high-speed data access and
advanced network capacity.
This tablet supports external 3G network by a 3G dongle. You can connect the
3G dongle to HOST port via the OTG convertor cable (the shorter one). You
can find the convertor cable in the accessories. However, this tablet supports
some 3G dongles, but not all dongles. If you need a special dongles to support,
please check with the shop before you buy it.
3.3.2 Internal 3G support (optional)
Internal 3G is an optional function. If you purchase this tablet with a SIM card
slot, you can access to the Internet via your 3G SIM card while Wi-Fi network is
not available. Please insert your 3G card into the SIM card slot of the tablet,
and the tablet will obtain 3G signal automatically.
Frequency: This tablet support WCDMA SIM card