The below article is NOT specific to any particular make or model router. See your specific routers user manual or setup instructions for device specific guides. The article will give you a FANTASTIC understanding of wireless routers and general guidance for best performance! We HIGHLY advise reading through the article and checking out all the GREAT resources and advise written by the pros at PCmag.com 

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How to Set up and Optimize your wireless router
Best Routers for 2020