A:AnswerYes, it wil.
I replaced my Comcast modem and it works perfectly. This unit does not have WiFi so you will need to attach a WiFi router.
It has one Ethernet port so I have a Netgear Nighthawk WiFi router attached.
To the router I have attached OOMA for VOIP.
It all works great.
A:AnswerThis will help with the speed but you will also need something like this to help boost your wifi signal strength.
Linksys - Max-Stream™ AC2200 Tri-Band Wi-Fi Router - Black
A:AnswerYes. This router works when connected to your internet service providers modem without the need to pay for their own modem/router. Just keep in mind this a router and needs a modem to function.