BTmute will attempt to increase the volume on your Treo 650s headset
Edit by : Is your BlueTooth Headset Not Loud Enough on your Treo 650?
BTmute will Attempt to increase the volume on your Treo 650s headset (BlueTooth or wired). As many of you know, there is a nasty bug in the Treo 650s phone application that limits the volume output to a headset. BTmute automates the mute workaround to the volume of your calls are autoamtically increased when the mute trick actually works.

Note that from our experience, GSM phones (if your Treo has a SIM card it is a GSM phone) do not have the volume problem via BlueTooth. Please utilize the Trial period prior to purchasing. Most customers tell us it works great on their Verizon phones! you can free download GoTreo BTmute 2.7 now.