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My phone automatically off and automatically on in night after 1am to 5 am not daily how can I solve it.
I'd suggest that you back up your important data on your phone's internal memory and perform software repair using PC Companion using PC Companion. Click on links for detailed guide.
I believe that it's software related, some scheduled tasks are setting the kernel in panic and the device reboot, before doing a repair try to boot in safe mode, if the device don't reboot spontaneously then you can perform the software repair as @Quester advised.
If you haven't been able to update yet then that would be recommended as well.
Regarding the speakers I'm afraid that seems to be hardware related and your phone would have to get examined further at an authorised service center in that case.