Random freezing and mms issues in iOS 6 Beta 3. anyone else having these issues?

I'm running iOS 6 beta 3 on my iPhone 4 (GSM). Anyway, I'm having a couple big issues. I know it's a beta but am curious if anyone else is having these issues or knows of any fixes. I never had issues on the first 2 betas but are having big issues on beta 3.

First of all, MMS doesn't work on AT&T's network anymore. I tried resetting network settings and restoring to no avail.

And the other big issue are random freezes. For whatever reason, sometimes when navigating through the UI, my phone will become completely unresponsive for 10 seconds or so.

Is anyone else having these issues and do you know of any fixes?

 

Anyone? Hoping for some help here.

 

I'm considering doing that. The only thing is that I have a ton of texts I need on my phone and would have to restore to a 3 month old backup without all of these.

Slightly off topic here, but if I copied my SMS folder from a jailbroken iOS 6, could i manually put it back onto a jailbroken iOS 5.1.1?

Edit: Nvm, found out how.