Question about Uniden DCT646-3 Cordless Phone

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My DCT646-2 no one can hear me.

I have a very similiar problem with this post. Both my phones did the same thing. I unplugged the batteries and the bases. When I plugged everything back in my 646-1 started working again but my 646-2 still doesn't. It will ring, show the caller ID and I can hear the person but they still can't hear me. Help please!

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  • Anonymous Nov 02, 2007

    Same problem here. I've never had many issues with other uniden phones but this has happened to three of my 646's. I then bought a dcx750 (feels like it hasn't even been a year but could be wrong) and yesterday the button panel stopped completely working. It lights up and rings when a call comes in but I can't answer or dial, nothing.

    Extremely disappointed and I'm down to 1 phone so it might be time for a switch.

  • Anonymous Jul 06, 2008

    I HAVE

  • Anonymous Jul 06, 2008




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Take it apart and clean the mic with alcohol. (I took out a black round cover it had on top to reduce eco)
Worked for me.


Posted on Jan 15, 2008

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We had similar problem with XS916 dual cordless models, first one handset went extremely faint for external audio output, then just recently the other handset went exactly the same way, making both pretty well inoperable. Found this blog suggestion worked well, took both units apart (2 micro screws under batteries, then a further 5 inside), took rubber protector off microphone at bottom of unit, gave clean with small art type paint brush & methylated spirits, carefully put back together, both units now work fine as new.

Posted on Apr 18, 2010


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Hi there,
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Good luck!

Posted on Jan 02, 2017

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