Modem/wifi router

It’s up you what you purchase. Keep in mind that whatever you buy should have the ability of the speeds you pay for. And that gateways like the one from Comcast aren’t for sale

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@rlaw1952 wrote:

If I puchase my own wifi router/modem combo, can it be a Docsis 3.0 like my current Comcast Modem which is Docsis 3.0.   i spoke to an agent in February and she told me to get a 3.1.  They are very expensive, just wondered why I can't purchase a 3.0 just like my current Comcast modem/router?  Thank you.

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A Docsis 3.0 should work but you may not get access to new features/speeds that a new plan and 3.1 modem would provide.