Fixing buffering

Buffering is almost always the connection between the router and the TV, not the service.

A Wi-Fi router
  1. Test the speed on the TV itself: HD needs roughly 5 Mbps, 4K about 15–25 Mbps.
  2. Use an Ethernet cable if the router is near; it's the most reliable fix.
  3. Move the router out of cabinets and away from the floor, or add a mesh point near the TV.
  4. Use the 5 GHz band if the TV is in the same room as the router.
  5. Restart the router and TV, and install TV software updates.