W.O.W. → Purchased my own modem; what now?

I picked up a Motorola SB6121 on sale and plan on using it instead of the modem I'm currently renting. Is it simply a matter of swapping it out and returning WOW's modem or will I need to have firmware pushed to it? Thanks.

Connect your new modem and them call wow and give them the hfc mac so they can put it on your account. Then if you want you can drop your modem off at your local office.