I know someone that has Ilox upstairs and Telmex downstairs. Iptv works on firestick just fine with Telmex and nada with the Ilox. 100% this is Ilox. I suspect Ilox is throttling speed with iptv because they offer a tv service. Think you need to request a public ip.
Biggest problem I have found with a few Derek did was the stick was associated with his account and Amazon would not allow me to download needed programs. You may have to create an Amazon account and register the stick under your account.
Could be your apps need updating. I have fixed quite a few sticks that Derek sold. My advice is look up the apps on youtube. Many tutorials, it's not hard and no cost to you.
Just a guess here... Ilox offers streaming tv and likely has a deal w/ Netflix. Sounds like they are throttling any competition and also explains the starting out with a private ip. Guess count your blessings they aren't doing the data cap yet.
By HD model they mean buy the Fire Stick 4k. The cheaper priced fire stick (which gets sold a lot around here as" jail broken") is 5 or 6 year old tech.I am seeing lots of positive reviews of the new TiVo Stream 4k. It runs Android Tv like the Nvidia Shield does for $49.99.
https://www.tivo.com/products/stream-4k
I have the newish receivers (still have them if anyone wants to buy lol). Probably was a matter of repositioning the dish. I'm saving $100+ per month now and get the good ol' MeTv, Cozi or whatever I'm in the mood for. I'm good.