Remember this is a percentage market share chart, so it always adds up to 100%. The "slump" you see is a spike in Symbian share. Related: it's important to rea

Remember this is a percentage market share chart, so it always adds up to 100%. The "slump" you see is a spike in Symbian share. Related: it's important to realize when reading this chart that the absolute number of phone shipped in this period was exploding from year to year: it's quite possible that every single manufacturer on the chart (except maybe Palm) shipped more devices every single year; Android and Apple just grew faster than the others.