Here is what happened,
1. I updated the Android OS version, since I didnt do for long time.
2. Along with that it updated some other Apps.
3. When it rebooted, it gets stuck at "4 color circle animation"
4. I cant reset to factory settings either. never gets into factory reset screen. I think this is because it was in "locked state" (I had set a lock password).
How do I factory set, is there a way at all?