Sony sold 5 million Xperia phones in Q4 2016
5.1 million Xperia smartphones were sold in Q4 2016 - 2.5 million fewer units compared to the same quarter of 2015. Sony says that it's been impacted by the reduction of handset sales "mainly in Europe", but also in "unprofitable regions."
Overall, Sony Mobile sold 15 million smartphones throughout 2016. That's the lowest number of handsets sold in a full year since 2012, when Sony Mobile was established (after Sony bought Ericsson's share in Sony Ericsson). Still, we're pretty sure that Sony is actually glad to sell fewer smartphones as long as it's not losing money.
If you want to know more about Sony's Q4 2016 results, including details not related to smartphones, check out the second table below, plus the info available at Sony's website (via the source link).