I was wondering what ASU is under the decibel reading for signal strength my evo 3d and epic touch sit at the same signal strength decibel wise but the evo 3d has anywhere from 6 --12 ASU while my epic touch never changes from 0 ...call quality is far superior on my epic, that's with zero bars while the evolution 3d has four hence the reason I was checking the actual decibel readings ...I think the DB is for decibel if anyone can explain I will reward you with a cookie.