Prior to the update just released on AT&T, I had very few problems with my phone. The only repeatable issue was with a lockup immediately following pairing with a new bluetooth device. Once paired, the phone never locked up again until I paired with a new device.
Since the update, I have had several issues:
1. The screen brightness adjusts automatically for no apparent reason. Up and down repeatedly, quite often settling on a dim setting that makes it difficult to read. I never experienced this prior to the update.
2. Third party live tiles do not appear to be updating. I do get updates for mail and message counts, but USA Today, Amazing Weather, MyStocks no longer update without entering the app. Sort of guts the whole Windows Phone experience.
3. Hard a very hard lockup of the phone the first night after the update when charged wirelessly. The phone did not charge until I placed it on a wall charger and did the volume + power reset.
4. In the dark last night, I noticed that the capacitive keys did not light up while I was using the phone. This happened at the same time I was experiencing the dimming of the main screen.
My wife's 920 is also experiencing the backlighting issue. The good news is that so far the update does appear to have fixed the problem with here phone locking up daily.
Try the following to fix the brightness issue:
The phone might need to get a baseline reading of light including very low/no light to recalibrate.
My wifes and Lumia 920's are both having this same problem. I have tried the taking it into a dark room and restart for a baseline brightness setting...well I still have the constantly adjusting brightness, which is very annoying in a "dark" room.
Same here, dark room fix didn't work. Overall, the brightness while in auto just seems dimmer and harder to read. We really need the ability to adjust the base brightness even while in auto. Before the update, the brightness was great for me, but I am sure everyones preferences are different.
And brightness is just one of the issues I am seeing. "Dead" Tiles are probably the worst.
Live tile issue was resolved by one more reboot. Don't know why it took several reboots to get them working again.
We have encountered two additional issues since the update. My wife's 920 locks up when streaming to bluetooth. I have tried both Nokia Music and Xbox Music over bluetooth. After 10 - 15 Minutes, the phone just locks up mid song and requires a hard reboot. My 920 does not have this issue. We are connecting to a Nokia Play 360 speaker.
My problem is with Ford Sync over Bluetooth. When playing music or Audible books it is fine, but when playing podcasts from Xbox music, there are very loud and frequent popping in the speakers. I have tried several different podcasts so it isn't a bad recording.