XSTREAM4 REVIEW: 1.Screen resolution select in auto xstream4 only supported for 1080p60hz with hdr of star4k and ott 4k contents. 2.HDR working in manually selected screen resolution of 2160p25hz or 30hz.not for 50,60hz. 3.once i am selected sd channel starting time 2 or 3times voice is breaking in my av reciever. After no voice breaking. Only this box issue audio video sync in my av reciever.HD channels sometimes this issue coming. Star4k and ott contents no av sync issue. 4.HD channels quality amazing in both audio and video.SD channels quality is average. 5.No lagging issue. channel changing and option select very fast of previous xstream box.