I have an Amazon Prime account that works everywhere, so on the mobile phone laptop now recently I ordered a TV I wanted to log in then you have to enter this code where it says on TV on a mobile phone in this website and then you are actually right in. For me it was also like that I was in it but as soon as I pressed a film or series it says 30 months for free I will be a Prime member, etc. Although I'm already a Prime member and pay every bill. I've already logged out several times and tried again, but it always says so and I can't look at anything even though I'm actually in my account and there's my name and everything. Would be super nice if someone would help me, thank you.
TV is not TV.
I can only speak for Android TV (Google Store) or for the Amazon Fire Stick.
I simply installed the Prime App from the Google Store and entered my login data (email and password). Done.
Simply plug in the Firestick Email + PW ready.