TOPIC: DUAL ISP(Wired-bayantel and Broadband-Tattoo)????

I have existing bayantel DSL for my LANSHOP..
I also have 4G Tattoo Broadband USB Modem...

this is my current setup

DSL ---> MODEM ---> HUB/SWITCH --->SERVER and CLIENTS(8 PC's)

Now, ask ko lang po possible po ba gamitin ko yung USB MOdem sa Server para maka DUAL net yung mga client ko?... If possible po ano setup gagawin ko? Paturo naman po mga master.. sayang kc USB Broadband ko if hindi magagamit, atleast may backup net ako..

try mo bumili ng dual wan router.

you need
2 Lan card and one of your Server's USB slot

or

1 Land Card, 1 router, and one of your Server's USB Slot