Your IPTV Reseller Panel has a default stream format — usually HLS, MPEG-TS, or DASH. Most resellers never change this setting. But different formats work better on different devices. HLS works best on Apple devices. MPEG-TS works best on older smart TVs. DASH works best on Android. Serving the wrong format to the wrong device causes buffering, black screens, and frustrated customers. Here's the thing: British IPTV resellers who detect device types and serve matching formats eliminate a whole category of "random" problems. Your panel may support device detection. Most resellers never turn it on. Example: a reseller had a British IPTV customer with a new iPhone who complained about constant buffering. Everyone else was fine. The reseller checked his IPTV Reseller Panel logs and saw the iPhone was being served MPEG-TS — a format iPhones handle poorly. He enabled device detection in his panel. The iPhone started receiving HLS. Buffering stopped instantly. The pattern that keeps showing up is this: format mismatches look like network problems. They're not. They're configuration problems. For British IPTV specifically, test your service on: iPhone, iPad, Android phone, Android TV, Fire Stick, Apple TV, Samsung Smart TV, LG Smart TV. Note which format each device prefers. Configure your IPTV Reseller Panel to serve the right format to each device type. What actually works is setting your panel to "auto-detect" if available. If not, create separate channel lineups for each format and assign users manually based on their device. It's tedious once. It pays forever. Honestly, most resellers serve one format to everyone because it's easier. Easier for you. Worse for every customer.