Also experiencing poor quality on 2nd Verizon iphone 5
I also switched to a Verizon iPhone 5 from an AT&T iPhone 4. I have the same issue of robotic voices, choppy sound quality and cutting out altogether at times. I purchased at best buy, and have already returned it once. 2nd verizon phone has same issues. I have tried all the fixes:
turning off bluetooth
turning on hearlng aid setting
resetting to factory instead of restoring from my iphone4 backup
resetting network settings
updated to ios 6.0.2 which was just released yesterday - I am hopeful that it might be fixed in the next version that is still in beta, but I'm not holding my breath.
My plan is to return the phone and try an iPhone 5 via AT&T. However, based on 29 pages of similar complaints on Apples website (below), I believe the problem is with the iPhone 5 itself, regardless of carrier...the originator of this thread was on AT&T, and many users with European carriers are experiencing the same issue. I will try the iPhone 5 on AT&T for the same period of time 14 days, then return it for a 4S if the problem is not fixed by switching carriers. I'll try to remember to come back here and post my findings. Take a look below, its happening to alot of folks in alot of different situations.
https://discussions.apple.com/thread/4348915?start=0&tstart=0