The iphone6 came out in September, so of course they had a good fourth quarter. Every Apple customer was compelled to buy a new phone during that quarter (in their never-ending quest to get something that approaches decent). Only looking at one quarter is the same sort of self-deception that climate change alarmists use to claim that numbers for a sliver of time represent some sort of big trend.
Samsung has been declining in sales over the last six quarters ... they’re on the way down ... because other manufacturers are horning in on their low-end market ... :-) ...