Samsung Galaxy S2 hangs/freezes sometime I am using Samsung Galaxy S2 for last 4 days. After two days of usage, I am experiencing phone hanging frequently. It just freezes while operating. The screen light won't go off and screen stays freezed. Only way out is press &amp; hold power off button and restart S2. 

I was using a launcher called, Go Launcher EX. Thinking this launcher is making the problem, I uninstalled everything related to this. But it didn't fix the problem.

I am running the following applications other than the defaul samsung installed ones. 


Advanced task killer 
Amazon Kindle 
Angry birds 
Dropbox 
Facebook
Firefox 
Gmail 
Picture Dial 
Springpad


I am not sure which application causes the problem. I am thinking of doing a factory reset. Before I do that, just wanted to see if someone else faced the problem. 

If the crash/freeze happens next time, is there a place that I can look for diagnostic information? Like logs, dumps etc.

Edit

I got it freezing again. I was charging the phone and got a call. That froze the phone.

Any help would be appreciated
If you suspect an app or service is causing the freeze, and if your phone is rooted, install Bloat Freezer and then freeze  background apps and services in groups to try and isolate the problem.
A good list of apps that can be safely frozen can be found here. Some of them are:


All share
Analog clock
Android live wallpapers
Ap Mobile
Bookstore


There are over a hundred listed in the post I've referenced.