The Amazon Appstore does not display Cosmote TV or EON on this specific model, nor sideways. They were installed in a sideways manner, so some may have difficulty (the Aurora Store malfunctions, as it requires mouse toggle - which the application itself does not support for the new sticks). I did not find Ertflix and Ant1+ even sideways. Netflix, Disney, VodafoneTV, all OK. I hope the external applications Cosmote and EON will work smoothly, as it has not yet been tested in regular prolonged use. If you are mainly interested in COSMOTE TV, it is better to buy a previous model of the firestick (the officially supported devices are Fire TV Stick 4K Max - 1st Gen (2021) - AFTKA, Fire TV Stick HD - 3rd Gen (2020) HD - AFTSSS, Fire TV Stick Lite (HD) - 1st Gen (2020) - AFTSS). I bought the new 4K model - 2023 as a more modern one with a newer operating system, but I probably didn't do it right.