Hmm.... sounds like you either have a faulty unit, in which case try taking it back or its something to do with your carrier? have you ever experienced these problems before with your carrier?
I haven't experienced it before.
How long have you been having these issues?
Are you 100% sure it's not carrier issues / local interference.
I manage 15+ mobiles of various makes at work and see the issues you describe maybe once a year, they are usual resolved by rebooting a couple of times and maybe waiting an hour or two.
I had these issues since Tuesday evening and Wednesday almost all day, after booting up to 3 times, it works for a few moments and then it was dead again(I also had some problems with changing the volume in media, the buttons just didnt work in some games). So today i decided to do a hard reset, and so far everything seems like it's working. I tried to call a few times today, and it worked. But there was one moment there was this strange noise, like a zooming bee.. really soft, but the other person could hear it better than me. I was also able again to change the media volume in games.
If i experience any troubles I'll share them again
Thanks for the replies so far
-- EDIT
It happened again -.- Can't hear or talk again. Going to call LG and T-mobile about it tomorrow
--EDIT 2
I decided the cancel my contract renewal with this phone. Returned it to T-mobile and i'll just wait a few more months to see what will come ! I just didn't want to take a risk to use the VIP service within the 8 days you can decide to agree on the contract or not. And also, having to use the VIP service while your phone is just 2 days old gives me a bad feeling about this phone (also reading other stories about bugs and stuff). I hope others do enjoy their phone
- SnEAky