hey guys, well it's been great since the GB update but i just started having problems around 3-4 days ago. Well, i have random reboots too but my sound doesn't work randomly. I would reboot the phone and it's fine for maybe 2 hours and no sound. No ringtones, no notification, just vibrate even when the sound is turned on. I have tried deleting cache and factory reset, but both didn't work. anyone got anything? let me know. Thanks guys.