So, My iPhone 4 was jailbroke, and I've had use it for few month already, but today. After I receive a voicemail, the problem occurs. The problem is, I can make call, the one I call can accept my call, but my iphone still showing that "calling mobile...", when calling, the "doo~doo~doo~" sound disappear. Also, if someone call me, my iphone can't receive them, and the one who call will be redirected to the voicemail. While calling others, if I press end call, it will say call ending.. for a second for normal, but for my iphone it will show call ending forever I tried once already, so I restore it and jailbreak it again, but it occurs this time too I try to reset all setting on the iphone, its worked!!! But after a respring or reboot. The problem is back Is there any way that can solve this ??