Windows Phone 8 GDR3 apparently in testing
According to Verge editor Tom Warren the next version of Windows Phone 8, GDR3, is currently in testing.
The software update is rumoured to support 1080P screens and quad-core processors, needed to support the current high end standard for smartphones.
Nokia is said to be in advanced developer of a phablet using the same hardware and software, with the device expected to be released later this year. HTC is also said to be working on a Windows Phone version of the HTC One with similar specs.