Question about LG CU400 Cellular Phone

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LG CU400 Cell phone

I have a CU400 cell phone that will only allow me to speak if it is on speakerphone (can be quite embarrassing you know!) Text,pics etc. all work fine. Any help would be appreciated.
ps I have turned it off on/removed battery/removed sim card to no avail

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  • jmorrow Oct 03, 2008

    I am on my third LG CU400 that has had this same problem. I have three others in service that have not had this problem. The only common factor is that the three that went bad were paired with Motorola H350 Bluetooth Headset. (One of the operational LG CU400s is also used with a Motorola Bluetooth Hedset and has not been effected.) The first time I noticed that I could only hear with the Bluetooth in use or on speaker phone. People on the other end could hear me fine. AT&T said the phone was sitll in warrenty so I sent it back to LG and they sent me another phone. Within three weeks I had the same problem. I took this unit back to AT&T and this time, even though this was a new phone, I had no warrenty. I switched my sim card to another one of my LG CU400s that was working fine and had been for over a year. Within a couple of weeks the earpiece on that unit stopped working.

    Every LG CU400 that I pair this Motorola H350 works fine initially then within weeks my earpiece stops working. I either have to use the Bluetooth or the speaker phone.

    Could this be a software issue?

  • Anonymous Dec 08, 2008

    no it's a software issue. screw corporate america DIY it. 

  • Infinitymc
    Infinitymc Dec 24, 2008

    BT250v jarba bt headset beeps and can't use handset!



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You need to take the phone to a repair center and have the microphone replaced.

Posted on Jun 29, 2008


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