1 MB/s = 8 Mbps
Netflix suggested that 4K requires 25Mbps, not 25 MB/s (should be 3.2 MB/s)
手機wifi is 200-300 Mbps = 25-37.5 MB/s
Sony TV has 9.X-15X MB/s, should be able to stream Netflix 4K smoothly.
But 1000MB光纖入屋, lan speed should not only 9.X MB/s,
Need to check router setting, or existing router is not capable to 1000 MB/s WAN