Sources: Samsung , , The Wall Street Journal
quote: What should we make of this? These are (to repeat) approximate numbers, but it seems clear that Android phones remain in use for well below the 24m average for the market, and during the peak growth period the replacement rate was closer to one year. The chart below compares what a 24m replacement cycle would have looked like compared to Google's own numbers.The cycle clearly seems to be lengthening, but it's not clear yet how much.Meanwhile, we don't have comparable data for iPhones, but the fact that around a third of the active base is on the iPhone 4 or 4S does rather speak for itself: if anything the iPhone is on longer than 24 months, especially if you take 2nd hand into account (though quite a lot of that second-hand seems to be exported to emerging markets, complicating the picture).This has some interesting ecosystem implications. It looks like the Android ecosystem has to sell significantly more phones than Apple to get the same number of active users. This is probably good for the OEMs (presuming the replacements are not people switching away from Android to iPhone), but less good for Google. Ironically, Apple might prefer it to be the other way around as well - it would probably prefer you buy a new phone every year. But this makes comparing market share problematic - it looks like a given number of iPhone unit sales might mean more customers than the same number of Android unit sales.
quote: Meanwhile, we don't have comparable data for iPhones