PiPO M9 pro OTA - Manual (Page 17)

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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
HSPA/WCDMA: 2100/900MHz
GSM/GPRS/EDGE Quad band：850/900/1800/1900
3G download speed maximum 7.2M bit/s, upload maximum: 5.76M bit/s