i-mate JAQ3 Smartphone "loud buzzing phone" Questions

...loud buzzing sound on and off. The phone was purchase in China, and I want to know if anyone can help me fix this problem please. I don't hear the buzzing sound ... Only the people i talk with, hears ...

...loud buzzing and crackling. It gets progressively louder then my phone shuts off. What can I do to fix this problem? Very common problem with 8300 series. My phone started doing it too. Don't mess ...