I don't think market share is the best metric for measuring iPhone success, or even necessarily one that Apple cares about (save for when it breaks in their favor). As with the Mac, they seem content to let their competitors fight over the high volume strata while staying in the upper tiers and banking the lion's share of the profits.
Market share is not really the number that matters to Apple, although it definitely seems to matter to people who want Apple to fail.
As abtinf pointed out, market share != profit share.
What percentage of smartphone profits does the iPhone garner in Europe?
That data, sadly, is not available anywhere – they don’t seem to disclose this. I only get results about SAMSUNG falling back in profits internationally, because in the US the premium market is focusing more on Apple. But no information about what the profits look like in Germany.