Just purchased a firestick ultra 4k. On all other devices getting well over 100 mbps wirelessly. Into the 500 or 600mbps with ethernet. But can only get 40mbps wether wirelessly or wired with ethernet adapter. Is this a normal speed??? Oh yeah I have fios gig speed.
If the firestick is close to your router, you should be getting close to your Wifi network/ISP speed (whichever is lower). Are connecting to your AC (5GHz) wifi network? I have several firestick which have no problem getting 50mbps on my 50mbps service or 100+mbps on my 200mbps service (my wireless network is AC1900). The system location in my 200mbps location is not ideal by any means, to which I attribute the lower speed.