Question about Dual Electronics CECT P168 Cellular Phone

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I have a cect i9+++ buzzing noise

I have a cect i9+++ so i think anyways but it has an ear piercing buzzing noise when others try to hear me wondering if anyone else has the problem or knows what to do about it thanks

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This problem exists actually at all phones of this kind. The microphone replaced to a more sensitive type, but the firmware is not tuned for it. In this case, the electromagnetic field of the flash memory controller near the microphone generate this noise. If you pull out the mic from its case, the noise clams up immediately. This problem could be solved by a new firmware. The voulme of the microphone can not be adjusted through the phone's UI.

Posted on May 13, 2009

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Hi bencebacsi,
I had this same problem with my daughters telephone i9+++. The microphone is seated in a little place in the metallic frame. I has a small hole for the sound. I made the hole a little bit bigger with a miniature metallic philips screw driver and seated the microphone again to its place. And voila....buzzing noise disappeared totally....at least for now....
Yours HarryHazard

Posted on May 29, 2009

  • HarryHazard May 29, 2009

    Hi guys again,
    I´ve been thinking why my method helped. I tried to solve bencebacsi´s problem by metallic earthed layer between microphone and the flash memory controller with no luck. There is propably an automated software to keep the sound level acceptable. If this hole in the metallic frame is too tight because of casting residuals, tries this software automaticly increase the sound level and at the same time it increases the noise. When You open this hole, there is enough signal for the phone to work without extra noise. This is quessing of course, but I had similar proglems with Nokia 9210i when microphone opening in the plastic cover was filled with dirt. I think that blakelock should try my method or return his phone to dealer. There are of course risks in shaping the metallic frame and You probaply would loose possible warranty, because You would have to open also the white paintsealed screw to get to the microphone.
    Yours HarryHazard


  • HarryHazard May 30, 2009

    Solution #3?
    Hi again guys. I been thinking again why this repair of mine fixed blakelockes and my daughter´s problem. The micropfone has a metallic surface and is seated to it´s place with a rubber piece to isolate it from the metallic frame. Could it be that this rubber was a little bit misplaced allowing the microphone to touch metallic frame? Metallic frame could act as an antenna and cause this buzzing noise. This would also explain why taking out the microphone from its original place could stop the extra noise. This could be easily tested but I do not want to put a working phone to pieces again.... :)


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SOURCE: I have a cect i9+++ buzzing noise

Did anyone solve the "buzzing" noise that others hear when using a CECT phone? I see hints that you can adjust a parameter to solve, however, I can not find the specifics. Anyone know?

Posted on Oct 27, 2009

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