Does the Fi collar require Wi-Fi? May 10, 2021 17:13 Updated Follow Yes. If you don't have Wi-Fi at home, we do not recommend using Fi. Related articles How will I know if the Fi collar has cellular coverage in my area? Why do I need one subscription per Fi Collar? Getting Started: How It Works, Setup, and Connectivity Can I use my dog's current collar with Fi? What if my puppy is still growing? Is Fi safe for puppies?