I don't know why but I am unable to stream videos above 480p on prime video on my asus zenfone 5z even on wifi.!!
FULL HD playback is not supported for 5z i.e the reason you will be able to stream only in 480p for amazon prime
5z doesn't support Full HD on Amazon prime.
Are u kidding, we zenfone 5z users have a FHD+ display and all we can watch is a 480p for Amazon prime. This is such a disappointment for a flagship phone.