This is a known issue with Sprint, the new software that should be available next week with REV. A and GPS, with WM6.1 should have a fix embedded with it.
To download the new software when it comes out go to
www.sprint.com/downloads.
Check daily, the target date was the 14th, but I haven't seen anything lately even in the new Sprint Playbook for retailers.
HTC Touch's price is dropping very low next week too, so if you any friends that want one on Sprint's network tell them to get ready to spend $150 less.