Can't hear caller and caller can't hear me unless I put on speaker phone

I found out my problem, which may only help some.

But - I had bluetooth on in my car for phone calls. When I came home and made a call, it would only work on speaker phone. I've since disable bluetooth and shut down the phone/removed battery and it was back to normal. I think the bluetooth firmware has a glitch & was still trying to connect to my car (which isn't parked far away). I'm either going to have to deal with doing this each time or request a new phone. I travel a lot for work and constantly restarting/removing battery is tedious.

Is anyone else seeing similarities with their bluetooth and car coinciding with this issue? I'm narrowed it down to that for me.

The same thing happened to me but I was in the store and my car in the parking lot. When I got home it did it again. I did the same as you, removed the battery and restarted. It only happened that one day and it was just after I first paired the phone and car.
 
This only happened to me AFTER the latest software update! I thought it was due to close proximity to my car, but it happens when I am very far from my car. I'm going to try the tiny reset hole on the bottom and other fixes here.
 
FIXED MINE: unpaired bluetooth settings, turned off bluetooth, turned phone off, then turned on. ;0) Works. Hope this helps. Of course I can't be bothered trying to pair and unpair my phone every time I want to use my bluetooth so I'll need to go in to the store and get resolve. Thanks for the suggestions which is how I got mine to work.
 
I'm having the same problem with my new HTC one x. What's worse, I can't even hear the caller using a headset or putting it on speaker. Thinking I'm going to have to return my phone. :(
 
Same problem on my new Galaxy 5. Clearly related to using Bluetooth. Once enabled to use speaker in car it somehow turns off the usual handheld functionality of the phone when not in the car. If I turn off blue tooth does not restore function. Must turn off blue tooth, un pair the car, and reboot the device then handheld function of phone returns. Have done this several times. Must be a bug? Bluetooth disconnect function not working?
I believe you are on to something about connecting to Bluetooth as I believe my problems (not being able to hear) came around the same time I set up Bluetooth on vehicle. Hmmmm
 
My sister had this issue with her S5 several days after she got hers..

All she had to do was reset the phone and it went back to normal, issue never returned. She called Telus to tell them and they had not heard of any other issues of this happening but when I looked online there had been several people who complained of this issue. This has not happened to my S5.
 
Same thing exactly is happening to me... Store made me do warranty claim. If there is any blemish at all they will not honor it warranty. Only speaker phone works but I am having them rush new phone for 14$ and I will send back faulty phone...not 2-3 weeks.... Only 2-3 days
 
This is a software problem! I have been seeing this for about a month and it occurred as soon as there was an update pushed to my galaxy S3 phone.The I have the LG HBS800 and I have had it replaced already I tried updating software again hoping Samsung had pushed fix or at&t perhaps but no success. The conversation goes one way with me hearing caller just fine but they can't hear me I can turn Bluetooth off and back on, go to speaker kand back to headphone, or just turn the Bluetooth option off and back on on the phone keypad. I can say without doubt this was direct result of update push. My wife has S4 active with same headset but no problems.
 
A friend had the same problem with an Android (I don't know the model) It was with the settings, it was on flight mode. My problem with my Samsung 3 was the keyboard. I found it almost impossible to type on... It was so frustrating...Way too sensitive! I fixed the problem.. Got another iPhone.
 
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Seemed that the headset logo kept popping on. Once I stuck a headset and and removed it. It fixed my issue. Hope this helps.
 
Sorta same problem here on my S5. Except I can hear them fine, on every first call though, they can't hear me. Driving me nutz, can't do another replacement as I'm rooted now. First one was replaced same issue.
 
Same problem. Noticed I had my bluetooth setting on. When I took it off, called person back and they could hear me.

Once I took my bluetooth setting off, I called friend back and they could hear me fine.
 
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Every time that has happened to me, my Bluetooth on the S5 was enabled BUT my Bluetooth device was NOT being used by me.

It just happened to be "ON" and "in range" and "in use".

Yes, it is very frustrating, but the first thing I do now when I take my BT headset off my scalp is to Force it to Power Off.

That totally resolved my one way audio problems.

YMMV
 
I broke my screen and put tape in the corner, unwittingly covering the little hole next to the charger socket. I removed it and hopefully my sound problem is solved. Never would have occurred to me! Thank you so much!
 
Try Pressing slightly and gently on the top of your phone near the front cam , which may solve this issue.. Thanks...
This is a solution for not hearing the other person on the call unless loud speaker is switched on.
 
I have had my phone now for about a month and a half. Actually bought the Active and thought that was the problem so switched it to the s5 only and still the same problem from the day i bought it. I can hear the caller fine but after about 5 min of speaking they cant hear me. Happens on almost every call. If i put in the speaker headphones works great they can hear me crystal clear and no problems. Obviously a software problem on there end! Sometimes i hear what sounds like bubbles. Very frustrating for expensive as this phone is!
 

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