Anyone else experienced the phone suddenly goes into the white screen with the black logo as if it reboots but it takes only few seconds and I get back the locked home screen? please advise. thanks
This happened only once with me the first day I got it, but it hasn't happened since and it works fine. I wouldn't worry too much unless it continues to happen.
The phone is respringing the springboard. Means something in the firmware/software cause a "soft reset." Generally a fresh restore would fix that problem, if not, it is likely a hardware problem.
well then your backup might be corrupt. better to do a fresh restore and set up as new, then sync what you want from your computer back to your phone. if you had this problem before and you just restore from your previous back up. its not going to do anything to fix it.