Default I have trouble with my n9005 Hong Kong version about sound.

I need your help. I have a N9005 Note 3 bought from Hong Kong. At first time I reboot my device there is no problem, everthing works properly. But after using a few hours, I can't get any sound on my headset's right side. Also a few while later, in addition to headphone, speaker gives out a sound. One more think drives me crazy is that when I answer my incoming call or call anyone, even though the headset is not plugged in, the device gives out a sound from both the speaker at the top and at the bottom. It gets well after turning the speaker on and off on the call page. Everything gets well after rebooting and stars all over again. This problem is occuring since upgrading Android to Kit Kat. There wasn't such problem before. Please help me!