Some app setups tie your subscription to the specific MAC address your app reported at the moment of activation. Reinstall the app, switch to a different device, or clear the app's data, and a brand new MAC address gets generated, one that no longer matches what your account is expecting on the other end. The app opens fine and looks normal, but nothing actually loads once you try to play anything. This looks identical to a dead subscription from the outside, which is exactly why it so often gets misdiagnosed as a billing problem when it is really just a registration mismatch waiting to be corrected.

Scope narrows the cause down fast, and it costs you nothing at all to check first. One channel failing points to that single source feed and nothing more. A whole group failing while other groups play fine points to a server-side fault scoped specifically to that group. Everything failing at once, after you have already ruled out login and MAC issues, points to your line itself, or possibly a stale session that never reconnected properly. Treating all three of these the same way, which is what most restart-first advice does by default, wastes real time chasing the wrong fix entirely and leaves the actual cause untouched.

Switch away from the failing channel, open a completely different one, then switch back to the original one you started on. If it plays instantly the moment you return, the original session had simply stalled server-side, and your bandwidth was never actually the cause of the freeze you saw on screen. This single test takes only a few seconds and rules out an entire evening of router troubleshooting that would otherwise have gone nowhere and fixed absolutely nothing about what was actually wrong with your stream in the first place.

Some buffering is genuinely oversold capacity on the provider's side, and no app setting you adjust will ever reach that kind of problem no matter how carefully you tune it. It is worth asking any service what uptime it actually publishes rather than assuming or guessing based on how frustrated you feel. IP4KTV posts 99.99% uptime, roughly 53 minutes of downtime spread across an entire year, so stalls that survive every check above are really a provider question at that point, not a mistake in how you set things up on your end.