No. Wi-Fi is required for the first login only. After that the screen runs entirely from CAN data and works with no network connection.
You will want Wi-Fi again for three things: downloading a theme you have purchased, syncing your account after a purchase, and installing an APK update. None of these affect driving.
| Task | Wi-Fi needed |
|---|---|
| First login and activation | Yes |
| Normal driving and data display | No |
| Downloading a purchased theme | Yes |
| Syncing your account after a purchase | Yes |
| APK update | Yes |
Related: How to Log In to Your Screen for the First Time · How to Download a Purchased Theme · How to Sync Your Account After a Purchase
