Android Central- A few weeks after Android 4.3 leaked for the the Google Play edition Galaxy S4, today we're seeing the same pre-release build — JWR66N — leaking out online for the Nexus 4. The unofficial firmware comes to us from Jeff Williams on Google+, who bought his Nexus 4 on Craigslist from a Googler, only to find it running the pre-release software. With a little help from the Google+ community, IRC users and XDA, Jeff was able to create a system dump and backup of the ROM. Currently the radio and bootloader are missing from this package — word on the forums is that they'll be provided at a later date.
WhatsApp announced ending support for some phones, and it won't work on them. The popular messaging platform, owned by Facebook, has updated its support
TechFrag - The Android 5.1 Lollipop update was made available to only select users in March when Google announced the latest update. The update is now being rolled out to additional users of Nexus 5.
There was a battery leak issue with the 5.0 but now it seems it's resolved with the 5.1 update. I have this phone and I have got the update.
"Until now this version was only available for the Nexus 5 and Nexus 7 (2013), but developers recently got it working on the Nexus 4 as well."
Hmmm not bad but nothing special though