I found this after I removed the bloatware, I deleted the MPCS-IMandSocial.APK the Facebook.APK and the twitter.apk. and a bunch of other useless applications. In settings---->Account & Sync Settings there is an option Social+ Settings, when I tried to enter in that option the the phone restarts from the bootanimation I believe this is cause by the MPCS-IMandSocial-4.0.8-0203 application that are linked together with the phone settings in the account & Sync; and if some user ever log on in the app. probably when it tries to sync; it causes to restart. (I cannot confirm this as I am not experiencing the rebooting issue) So please if you are having the rebooting issue try restoring the MPCS-IMandSocial-4.0.8-0203 application to see if that fix the issue. I don't have the rebooting issue I never used or logged in into those applications; but my phone restarts if get in the sync setting of the Social+ Setting as the app doesn't exist anymore.