I am not entirely sure if this is a "Bolt" issue or a "Netflix app on Bolt". Unfortunately, there is no native speed-test for Amazon (or any of the other streaming apps nor for the Bolt itself) for comparison. I have cable modem with typical download speeds in 120-150Mbps to desktop when tested thru any number of speed-test services, including the router's built-in app. When I run Netflix app on my desktop, it consistently reports DL speeds of 54 Mbps (more than enough for 4k streaming). However, when I run the Netflix app on my Bolt, I am consistently getting only 6.2Mbps DL speeds whether connected via AC WiFi or Cat5 home (in-wall LAN thru Gigabit switch) or a Cat 6 cable directly to router. Just to be clear, when using Netflix app on desktop computer, typical DL speeds (reported by Netflix app) are 52Mbps. The Bolt is connected directly to the same Gigabit router as desktop using a brand new Cat6 cable... and the DL speeds in the Netflix app continue to be 6.2 Mbps. I am baffled. The Bolt has a Gigabit connection and all cables used are rated Cat6. no one else is using any bandwidth during these tests. these numbers have remained consistent over weeks. Only an issue now as I just got a new 4k capable AVR/display. This is not an HMDI issue, either.