Hmmm, I never seen that b4, but I'll prompt you ASAP when I do some research

This question is actually for an older friend of mine so please excuse me if I dont give complete information.

Upon powering the phone off, a small icon displays in the middle of the display that shows a small yellow page with a folded corner (very similiar to a PDF icon) that has a question mark in it. According to him, it does not appear all the time and has become more recent lately. What does this symbol mean? It appears right before the display shows "NOKIA" then turns off.

Any and all help is very appreciated,
Rkenley