I agree with everyone complaining about the sound. This change was terribly thought out. If it was an option in the calculator's settings, sure, but the clicking sound is awful. I like everything I do to be silent. Feedback is unnecessary and somebody else's suggestion to turn off system settings sounds, well mine has been off since I got the phone because as I said I hate having feedback sounds so that's not an option but I am appreciative that somebody thought to try and help. :)