I need some help. Called Sprint today but they were updating their system. Everysince Saturday, my phone calls have went dead within a matter of 3 minutes and the wireless radio is shutting itself off. I did a reboot and no change. I made sure the phone was fully charged and still no change. I also keep receiving e-mails saying the wireless network has been registered daily and when I check an e-mail on my phone it shows as unread in Yahoo. Any help would be appreciated.