i just got the centro from sprint...i was with nextel but switched over..neways i looked in my manual but apparently not good enough and i figured everyone would be able to answer this in 2 seconds here...soo....up at the top of my centro when on phone display i get a blue triangle sometimes over by where my voice mail messages icon is..what is that? and also what is the little blue box that has mini white triangles going up and down in it mean?? any other symbols that come up on this thing? thanks alot!