What applications have you installed?
How long are these freezes?
If you delete any non nokia or MS apps does it get better?
Wonder if there is a hardware revision with the WiFi radio. I've had my 822 since launch and has all the updates VZW released and I use a 32gb SD card. I work from home so my phone has had WiFi on since the start; granted its not connected all the time, disconnects when the phone isn't on. Phone has only locked up twice since I've had it. I have a whole slew of applications installed; only 4 of which is permitted to run in the background. I have a plantronics voyager pro bluetooth headset; the bluetooth radio majority of the time is off and can talk for a few hours, never had a disconnect with the headset.Since I disable WIFI on my phone on 6-1-2013, I have not experience any issues. That tells me...there's definitely a problem if you leave wifi on for a long period of time.
I had one lockup in the past: hard rebooted, and it gave me the bootable option error. Obtained a refurb... a prototype... it has been working, but the past two or so weeks, LTE was the main concern. It would never connect to LTE from home. It has since Monday been resolved on Verizon's end.