Around 125m smartphones and over 20m tablets were sold in Q4 2011. If tablets are included, Apple is now the largest PC manufacturer, while smartphones are now outselling PCs. These devices are the battleground for a war of ecosystems in which Apple’s iOS and Google’s Android platforms are dominant and others are hoping for third place at best. iOS and Android sold around 92m units in Q4 and now have an active base between them of around 515m devices. Samsung now accounts for at least half of Android sales and is in some senses more of a rival to Apple than Android itself.