I got an LG G2 the morning Sprint made them available. It's likely I was first in my city to get one. I was that excited. I still love this phone...it's my second now, as insurance replaced one that I accidentally "threw" and shattered the screen.
Here's my problem. Both on my old phone and on this one, I can't get any external bluetooth microphones to work. I've tried several Bluetooth headsets and a new Bluetooth speaker that has a microphone built in.
I've been through all the settings I can think of:
Language & Input settings
Each individual data setting screen, including Airplane Mode
"Call" settings (in the menus)
And I can't find anything or any way to make a Bluetooth microphone work. The fact that I had this problem on both phones with the same, and other Bluetooth microphones, leads me to believe it is something with phone software. There was one other thing I tried, that I read about online. Unfortunately it didn't work either. I went to settings>apps>all>bluetooth and cleared the data there...and did a "force stop" just for good measure. I've read the manual quite thoroughly, and haven't found anything helpful there, either.
I'm sure hoping someone can help me with this. There are times I really need that headset, but I have to use the phone to my ear instead.
When I got the first headset I wasn't using Google Now...which was quite different than it is now. I do now use all of the voice recognition features in Google Now/Search, so I tried your suggestion, and still it doesn't work.
To both SprintCare folks... I haven't taken it anywhere, as, like I said, the first phone and the second phone behave exactly the same. I can't help but think it's not something wrong with the hardware because it was the same with both phones that functioned perfectly in every other way. There has to be some setting or something I'm missing...
From my experience a day from what I've read, turning off voice recognition in Google Now fixes this issue. It did for me. I don't know what else to suggest. It actually might be time to go to a Sprint Repair Store, hopefully they'll have a clue. Unfortunately, many of them only solution to every issue is to wipe the phone.
I thought all of you would like to know that my wonderful, lovely husband has solved the issue. This does NOT require any kind of repair.
The cause of the problem is that the WiFi and Bluetooth frequencies interfere with one another. Therefore, I can't use a Bluetooth microphone if my WiFi is turned on...even if it's not in use. Because WiFi and Bluetooth use the same radio frequency, there is interference in general...it has nothing to do with the LG G2 or any other specific device.
The solution is to turn off WiFi when I want to use a Bluetooth device that isn't working properly.
I'm so glad he found that, as my next step, even though I wasn't thrilled about it, nor did I think it would work, was to go through a hardware reset...boy are those fun!!! Very different from a "factory" or software reset.
So if anyone experiences trouble with any phone having problems with a Bluetooth device that seems to work fine everywhere else, turn off the WiFi, restart the phone, and try again with WiFi turned off.