Originally Posted by captcouv
It's an HTC Eris.
I routinely use the volume keys. Still doesn't stop various tones... I think these are when wi-fi and/or 3G go on/off - though I can't confirm yet... only really happens at night when on the charger!
in which case i would imagine it will be in the settings somewhere. though you will probably have to delve deep into each of the settings to find it, but if you change anything remember what you changed and where it is, common mistake lol (and from past experience
sorry i could help further.