WhatsApp closes in on 1B users; Nokia appoints Jorg Erlemeier to oversee integration with AlcaLu

> WhatsApp, a mobile messaging service, was tipped to hit a billion users in 2015 after breaking through the 800,000 mark. Article

> Sony revealed its latest high-end smartphone, the Xperia Z4. Report

> Microsoft launched versions of its Office software tailored to touchscreen smartphones and tablets. Article

> Nokia appointed current European Global Services head Jorg Erlemeier, a 20-year veteran, to lead its integration efforts with Alcatel-Lucent. Release

And finally…Is it a palm tree? No, it's a mobile phone mast in disguise. Article