The micro usb port on M7350 can only provide internet from windows computers.
You need to buy a 3G/4G dongle in the compatibility list.
http://www.tp-link.com/en/support/3g-comp-list.html?model=Archer%20VR2800

Enson Loo wrote

The micro usb port on M7350 can only provide internet from windows computers.
You need to buy a 3G/4G dongle in the compatibility list.
http://www.tp-link.com/en/support/3g-comp-list.html?model=Archer VR2800

omg.. really? I haven't thought about that.. thank you very much.. you saved me from a big trouble..

I think tp-link should release a new firmware for this.. it should be easy to use as a 4g modem router not just for vr2800 but also for every 3g/4g modem router.

The VR2800 is modem router by default. There are many 3G/4G dongle, not easy to make every dongle compatible with it.

Enson Loo wrote

The VR2800 is modem router by default. There are many 3G/4G dongle, not easy to make every dongle compatible with it.

they both are tp-link.. so they should be compatible with each other at he beginning..

M7350 is not designed to be a USB device...
But you can send a feedback to TP-Link support to see whether they can add this feature.

Enson Loo wrote

M7350 is not designed to be a USB device...
But you can send a feedback to TP-Link support to see whether they can add this feature.

why not? I can connect M7350 to a laptop / computer via usb .. so it has capability to be a USB device..
I don't understand why you think this is an impossible situation..
M7350 and VR2800 have hardware capabilities for this..
So there should be a way to connect M7350 to VR2800.. this is not impossible..