Setting up IPTV is mostly not a matter of entering a code. Almost every failure people describe as a setup problem turns out to be one of three things: the player cannot reach the host, the playlist has not loaded, or the device is not decoding the stream. This section works through those in the order they actually occur.
Nothing here provides access credentials, channel lists or a working stream. Where a guide describes a provider login, it explains what the player is asking for and why, and leaves the details to whoever issued them.
Set up by device
Set up the software, not just the device
A general order of operations that works on most platforms: confirm the network first, confirm the player opens at all, then add the playlist, then confirm playback of a single channel, and only then worry about the guide. Changing two things at once is the reason setup usually stalls.