Your TV needs one DNS. Your phone needs another. Your computer needs a third. The reseller gives different DNS servers for different devices. Your network is fragmented. Nothing works consistently.
A British IPTV reseller who requires different DNS per device has a broken system. Their service is held together by manual workarounds. Each device needs its own hack to work. The reseller never built a proper system.
The British IPTV services with proper infrastructure use the same DNS for everything. No per device configuration. The reseller who requires per device DNS is running a patchwork.
The IPTV reseller panel doesn't require different DNS. The reseller's choices do. They've created a system so fragile that each device needs custom settings.
The IPTV reseller UK operators who value simplicity have one DNS for all devices. The resellers who require per device configuration are technically incompetent.
Here's a scenario that makes setup a nightmare. You set up your TV with DNS A. It works. You set up your phone with DNS B as instructed. It works. You set up your tablet with DNS C. You have to keep track of which device uses which DNS. You get confused. Nothing works.
Every device has different settings. You can't remember which is which. The reseller's fragmented system has turned simple setup into a complex configuration puzzle.
I've tested DNS requirements across dozens of resellers. Most use consistent DNS. Some require per device differences. The reseller's infrastructure quality determines whether setup is simple or complex.
A consistent British IPTV reseller will use the same DNS for all devices. You can test this by checking the DNS settings required for different devices. If they're the same, configuration is consistent. If each device needs something different, it's broken.
The same principle applies to other network settings. Some resellers require per device MTU changes, port forwarding, or other hacks. The careful reseller's service works with standard settings.
A simple British IPTV service will have the same setup for every device. Test by setting up multiple devices. If the process is identical each time, configuration is good. If you need custom settings per device, find a reseller with better infrastructure.