Question about Uniden DCT646-3 Cordless Phone

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Mic not working.

All of my Uniden phones are working well except for #3 which sounds fine but no one can hear what I am saying either with the intercom feature, incoming calls or outgoing calls. Please help.

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  • Anonymous Oct 13, 2008

    THANKS MATE !!!! That totally solved the problem!!!!!!!

  • rtapales Nov 17, 2008

    I have the same problem - I had a total of 5 phones on two lines. 3 on one line and 2 on the other. 3 out of the 5 now have the same problem. I can hear the people on the other line but they cannot hear me. The only way to get it to work is if I plug in my headset!



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It worked well for me too! Thanks!! I was told I had to buy a new phone because the microphone went back. Took the receiver apart (4 screws in back of handset and 2 that held the board in place), cleaned mic with alcohol and a q-tip, and removed the rubber piece that kept the mic clean (inside of the housing), and presto, it worked just fine. The ribbon cable came loose upon opening up inside of phone, but I stuck it back inside the top of base and I was ready to go.

Posted on Mar 09, 2009

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I had the same problem with the uniden cordless phones, I have 4 recievers and only 1 phone was working, people could not hear me talk although I could hear them. I removed the cover and cleaned the mic and removed the rubber piece, all the recivers work great know.. thanks for the info. The model of my phone set is DCT646-3

Posted on Aug 23, 2009

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Thank you all. I had the same problem, i took apart the handset, and used some Old Spice After Shave (did not have alcohol or spirit) on the mic to clean it up. I also got rid of that black cover over it. The cleaning fixed mine up.

Posted on Nov 28, 2013

I had that problem, i took apart the handset, and used alcohol on the mic to clean it up. I also got rid of that black cover over it. I think the glue got all up in it and is stopping the mic from working. The cleaning fixed mine up.

Posted on Dec 14, 2007

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Other issue that may cause this. No radio activity, (unless you hear radio activity low and not static)

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I can hear but the person I am talking to cannot hear.

try cleaning the mic' without openning the phone -
from the outside by an old touth brush...
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if you can open the screws without any damage
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