.......

[fab10]

4/15 volume ticks on a galaxy phone
[...]
Also the overall results thus far into OF v1 have been "meh". It's hard to say we've had good results.

If I recall correctly, @Shannon wrote that with u.s. the results seem to be proportional to the volume. Maybe that’s the reason for the disappointing results. If that’s the case and u.s. frequencies bother you, maybe you could try masked.