Actually, now I'm sure it's mainly problem on BB and beta OS. My WiFi at home has been stable for a while and working smoothly. But this morning my BB can't even load a simple web Wikipedia page in BB browser (not to mention Opera which worked even less frequently). I had to quite and come back then it started and finished loading.

It often seemed to me that the web connection went dead in the middle, after little or more use. And often the easiest way to bring it back is to perform a search in Google Search application. Then either WiFi or EDGE connection would suddenly came back on (like coming up of Gmail alert or map update in Google Maps). All these while UMA or EDGE symbol was clearly displayed on the screen.

So, this still remains a mystery to me. I've owned 8320 for only ~10 days and on the 3rd day I updated OS to 4.5.0.69. So it's hard for me to say if the factory 4.2.x.x OS is more stable (thought it was). Now with beta OS, my BB froze about every few days. Like this morning it froze while scanning for Wi-Fi networks. After more than 10min of freezing (no respond to any key press), the only thing I could do was to press Alt-shft-Del to reboot.

Maybe I should revert to factory OS. But I'd rather stay with beta due to video capturing capability.

Are there ways to improve stability (networking and general operation)? Is it related to available memory or installed 3rd party applications (though they're not running)?