I currently have the modem/router that Verizon supplied me when I signed up for my DSL service. I'm trying to increase the signal for my multiple devices so I purchased a ASUS RT-N66U N900 router. Do I need to replace the modem/router that Verizon provided with a new modem only? If so, do I need to purchase a particular one? And will there be any reason to call Verizon technical when I make this change?