I'd try to find out what's in the firmware update before applying it because you never know what can happen. I've done that with a Cisco router and ended up going back to the default firmware and building it back up from scratch. That can be a harrowing experience if you're not used to things like that. It always helps to have an alternate route to the internet (such as the 2000w's internal router) should you need to download something to fix a problem.
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