I own a Samsung Galaxy S2 I9100, currently running Android 4.0.3 XWLP7, rooted. My problems however started even before rooting the phone.
The problem is that whenever I try to call someone, there is about a 20% chance that the phone will freeze, sometimes for over a minute(!), without performing any action. I can hide the Phone application by pressing the home button, but the app itself is frozen and unresponsive. After some time passes, the call is made, even if I've hidden the Phone app by pressing the home button.
All other apps seem to work without any issues. The phone is otherwise completely usable and no other defects can be observed.
A while ago after googling, I found a thread on xda-developers that recommended clearing the data of "Call settings" from Settings -> Applications -> All. At the time I believed this to solve my problem, but the problem reappeared pretty soon, and I do not believe it to be relevant at all now.
I have tried restoring my phone to factory state, including deleting everything from the phone storage and reinstalling the OS, without any effect on the issue.
Is this a known issue, and if so, are there any remedies?