The free upgrade is for a wireless "g" router, which is what I currently have. The Actiontec wireless "n" router (rev. I) is the FiOS™ Advanced Wi-Fi Router being sold for $74.99
I would recive this Advanced Wi-Fi router for no charge if I upgrade to Quantum TV.
If I purchased or received this router for no charge most likely Verizon will ask me to return the rev. C router.
If you purchased the new one is yours. All others are Verizon's. They rarely appear to want the old routers back at an upgrade time, but do want them back at the end of your service, so HOLD ON TO IT. They used to vary this by how long you had the router. Over about a year they would take them back immediately, otherwise they would leave them in your hands. These days they appear to want rev F and later back.