If you activate the code but no channels work on iviewHD App, you can switch the decoding mode to try again.
Enter a channel – Setting – Misc -Decoding Mode
There are five modes, kindly check one by one and see which one will work for you.
Then you can watch.
iviewHD is one of the premium & stable IPTV in Europe, for Android OS devices only. And iviewHD supports 3 days free trial. If you need it, pls email me at firstname.lastname@example.org or add my Whatsapp/Telegram(+1 7047505887) for a quick reply.