Is it possible to purchase my own wireless broadband router and connect it to the spark network?

Are the sim-cards locked to the modem somehow?

I have the stock standard mobile broadband modem supplied which is a Huawei model. While the broadband connectivity seems ok, the wireless is terrible. I've switched over to using a seperate (old) wireless router for wireless, with a wired connection to the Huawei modem. I'm now experiencing increasing needs to power the modem down to fix connetivity issues. I want to improve reliability and simplify setup.

Thoughts?

Thanks Jayden