Buffering almost always comes down to one of three things: your internet connection, your device, or your app settings. Work through the fixes below in order. They start with the quickest.
Quick diagnosis
The 9 fixes
1Test your speed on the streaming device2 min · Easy
Run a speed test in a browser on the TV or stick itself, not on your phone. As a guide, aim for around 10 Mbps for HD and 25 Mbps or more for 4K, per screen streaming at the same time.
2Restart your router and device3 min · Easy
Unplug your router for 30 seconds, then restart your streaming device. On Fire TV: Settings → My Fire TV → Restart.
3Use Ethernet or 5 GHz Wi-Fi10 min · Easy
A wired Ethernet connection is the single biggest improvement for most homes. If you must use Wi-Fi, connect to the 5 GHz network and keep the router in the same room if possible.
4Check how many screens are streaming1 min · Easy
Most IPTV plans cover a set number of simultaneous screens. If more devices stream at the same time than your plan allows, playback can be interrupted. Ask your provider how many screens your plan includes.
5Clear the app cache2 min · Easy
On Fire TV: Settings → Applications → Manage Installed Applications → your player → Clear cache.
6Increase the player's buffer size2 min · Easy
Many IPTV players have a buffer or "network cache" setting. Raising it a step (for example from small to medium) gives the stream more headroom on a busy connection, at the cost of a slightly slower start.
7Switch the video decoder2 min · Medium
In your player's playback settings, switch between hardware and software decoding, or try a different built-in player engine if the app offers one. One option often plays more smoothly on a given device.
8Update your device and player app5 min · Easy
Install system updates (on Fire TV: Settings → My Fire TV → About → Check for Updates) and update your player app. Updates regularly fix playback and memory issues.
9If only one channel buffers1 min · Easy
If every other channel plays smoothly, the problem is probably with that single stream rather than your setup. Try it again a little later, and send your provider the channel name and the time it happened so they can check it. If many channels stall at peak times even on a wired connection, read how to tell if evening problems are the provider's fault.
FAQ
Why does IPTV buffer in the evening?
Home and neighborhood internet use peaks in the evening. A wired connection and a slightly larger player buffer usually help most.
Will a VPN fix buffering?
Usually not. A VPN adds an extra hop to your connection and can make buffering worse. Start with the connection fixes above.
How much speed do I need for 4K?
As a general guide, 25 Mbps or more per screen streaming 4K at the same time, measured on the streaming device itself. The full 4K checklist covers the TV, device and settings too.