Samsung's profits are up mainly because of chips which makes sense when they're manufacturing Apple's chips (and Apple's iPhone sales are up significantly). Samsung's growth in high-end phone sales is slowing down.
No the $6.3B is from the mobile division alone. Their chip sales also saw profits of about $1.9B which is double than same time last year, but the phone sales are still their #1 business.
Yes I know, my comment doesn't dispute that. Phones are the biggest piece, but increasingly that's coming from low-end phones, the growth in high-end phones is slipping.