BB Bold 9000 :: OS 5.0 - Randomly Crash And Restart And Crash And Restart

I have had my Bold 9000 for about two months. I bought it unlocked and have been using it with T-mobile. When I first got it, i upgraded it to the latest leaked os 5.0. The thing is, I had problems with it. First it would just randomly crash and restart and crash and restart, continuously tell it just drained the battery out. Sometimes, on restarts, the standard Blackberry ringtones would not work, and sometimes they would. Sometimes when it would restart after crashing it would say, "net_app_something_ (52) isnt working and was canceled". I assumed it was a bad leak and tried several different version. (and this same occurred with each OS. I would install it on my pc, on my buddy's who has an unlocked Bold 9000 on t-mobile just like me. In the end I gave up and went back to 4.6. Yesterday i tried the new, official OS 5.0.It worked at first, but then when I install the newest BBM, it started crashing again, until the battery was gone. So now I have reinstalled it, kept the standard BBM that comes with the OS. and also deleted Quickpull. thinking it might have to do with it as well. On a last weird note. It seems only to crash in the evening. In the morning it is perfectly fine, however once it passes 4pm , the crashing beings, non if this occurs with 4.6.
Any ideas? My friend and I are both lost. Sorry for the wordy post, but it is really difficult to describe the retardedness of this situation.