It's important that your USB hub be a powered hub, as it would need to provide power to your other connected devices.
Start by plugging your USB hub into a power source.
Then plug an OTG USB cable into your Mevo.
Plug the USB cable that comes included with your hub into the USB output port (i.e. the one that would connect to a computer)
Plug the other end of the cable into the OTG cable attached to your Mevo.
On the other end of the OTG cable, plug in your Mevo charging cable and connect it to power.
You can now attach more than one USB device to your Mevo, such as an audio adapter and an Ethernet adapter, or an audio adapter and a 4G USB modem.