Pretty inacurate because Internet service providers detect when you are doing a speed test and unthrottle you to make themselves look good and then cut your speed way back when you are actually using it. speed test with at&t 4G lte shows a download speed of 14 mbps but when I am actually using my internet it is BARELY 1mbps download, I can barely stream 360p videos and it often drops to 144p. not worth the $70 a month I'm paying AT&T