After other GPE phones, it's time for Sony Xperia Z Ultra GPE Android 5.1 Lollipop treatment officially.
After Nexus devices, the several phones in the Google Play Edition lineup are getting the Android 5.1 Lollipop update. First it was Moto G & G Pad 8.3, followed with One M8 and One M7, here comes the latest build for Xperia Z Ultra GPE phone.
The update file size is around 212 MB and available for download via Over the Air download. You might have got the update notification on your device but if that is not available you can force check for the update availability by going through Settings > About Phone and then tap on Software Update.
For those who want to flash it manually, download link is given at the end of the post. The Android 5.1 Lollipop is primarily meant to be a bug fix update and it includes minor software improvements.
There is no word officially that Xperia Z Ultra phone from Sony will get the update.