i am using MR600. try to search signal in your house. in my house different location will give me different speed. the rotation/position of your antena also will impact your speed also. mine manage to get from about 16MB to average 40MB and sometime in midnight can go up to 60MB. i am using unifi air btw.

can you select band? i just change the from unifi air to umobile unlimited. if band select is auto then the only half compare i specified i want to run on selected band.