Love the phone and enjoying playing with it.
The only I've experienced is that my Bluetooth headset randomly disconnects.
So far, it seems to happen primarily or possibly exclusively when WiFi is also turned on.
I listen to audiobooks and podcasts through the headset and it happens occasionally there, but seems to happen every time I am on a phone call at about 30 seconds.
Most times that it has happened, I've been stationary in my office with a strong WiFi connection, nothing between the headset and the phone and a good radio signal.
I just turned to CDMA only (will probably be a loooonnnggg time before we get LTE) to see if that will have any impact.
I remember a similar issue with WiFi causing Bluetooth issues on a previous phone. It was ultimately fixed with a software update.
I'm not in the habit of turning WiFi on and off (usually leave it on for better battery and performance at work and home), but may need to just leave it off unless I'm doing something data intensive.
I know there are others, but didn't Sprint announce an app that would turn WiFi on/off depending upon your location?