The unit just works. There is no feedback with lights like the older 510 unit. No flashing feedback saying it has signal or is working, just one green power light. I would like to see something confirming it was working...Just me I guess.
As I said it just works. Signal was boosted from 0 bars to 2 bars. When in a call it actually goes up to 3-4 bars. Excellent clarity. We live in a ranch with plaster walls, and it even gives us signal in the basement! My wife has T-Mobile and I have ATT. Both services work great and simultaneously.