I have Amazon.ca Prime, I bought an Amazon Fire TV 4k to get the 4k and have the ability to connect to the Fire TV through Alexa . Well guess what, that is only if you are using .com, using my .ca account (where I have my Prime Account) I cannot connect using Alexa, on top of this I can't even watch Prime friggin Videos because it only works in Canada on a Fire Stick, not on the 4k Fire TV. What a joke. Just adds to the inability to use Alarms with Prime Music in Canada and the inability to get Prime Music Unlimited in Canada not to mention all the other crap......sorry but I am pissed.
Update, now I have a "Fire Stick" but guess what I can't watch Prime Videos on it either (it was purchased in the states), I can watch it on the basic Fire Stick purchased in Canada but no 4k. So I switched to my Xbox One X and looked at my Prime Video app but guess what, I can watch Prime Videos but there is nothing in 4k, I assume because Prime Video 4k shows are also not available in Canada?? Also, I was able to create an Activity with my Harmony, not so easy with a Fire Stick, and now I can at least ask Alexa to turn on (go to) my Fire Stick.
Another update for anyone interested, I can now watch Prime Video on the Amazon Stick purchased in the states, it must have taken some time for my membership to go through or something.