Every time I post this, I get a huge number of people disagreeing with me. Still, I'm going to post it again:
The key reason iOS is losing ground is
price. Plain and simple.
If Apple's plan was to provide a more attractive entry-level offering with the 5C, they failed miserably. Apple's older models are priced even higher than recent models of their competitors (such as Nokia).
Apple's prices seem to be set in stone. That's a tragic mistake, because those prices were set at a time when Apple had a huge lead over their competition. That lead is much smaller now, but the price difference is not.
Ultimately, that leads to Apple losing the value proposition. They're simply not worth the price difference. I don't recommend iPhones to my friends or family any more (in fact, my sister just picked up a Nokia Lumia for £70 unlocked and off-contract; fantastic value).
Apple is going to keep on losing market share until they get this.
Take it from Steve:
Steve Jobs said:
What ruined Apple was not growth … They got very greedy … Instead of following the original trajectory of the original vision, which was to make the thing an appliance and get this out there to as many people as possible … they went for profits. They made outlandish profits for about four years. What this cost them was their future. What they should have been doing is making rational profits and going for market share.
Apple are now
literally making so much money they don't know what to do with it all. Surely the iPhone's volume has become massive enough that prices can be lowered by even as much as $70-100 per unit and Apple would still be massively profitable.
I'm not sure Tim has the guts to make that decision. Steve lowered iPhone prices launch, and even gave existing customers a partial refund (as an Apple store credit)! Every source is saying that the iPhone is losing steam at the expense of Android, not gaining on it. Let's hope Apple aren't suffering from tunnel vision just because the iPhone is holding its own in the US; in Europe at least my own eyes can attest that Android is everywhere.