HTC Touch Dual Slider Smartphone "phone rings once busy" Questions

...the phone still rings but goes to voicemail. Since they call 50-60 times a day, I can't even have it ring once over and over especially at night. Any suggestions? try smartblock ...

...phone still rings but goes to voicemail. Since they call 50-60 times a day I can't even have it ring once over and over especially at night. Any suggestions? ...

...ringing, if I phone it from another phone, it rings once then, has the busy tone, any ideas out there to help solve this? you might have the call dirversion set to on. check that in your call ...

...phone once I've truly given up on all of these software based efforts, and peek around for a loose connection or something. If I can find something, like an unplugged wire, it might be very easy to ...