OK gentlemen, this is definitely a testing build. It requires you first install the IMM76Q update. So you need to flash to IMM76K, upgrade to IMM76Q, then to JRO03O. The link is here:

http://android.clients.google.com/pa...Q.4a91da6c.zip

All the thanks goes to El Madhatter. I'm mirroring the file at randomphantasmagoria.com as I speak.
XDA's Resident Archivist-in-Chief
Every OTA update for every Nexus and Google Experience device since the Motorola Droid at http://www.randomphantasmagoria.com/firmware.


Model:
Carrier:
ROM:
Radio:
Bootloader:

Samsung Galaxy S5
SM-G900T
T-Mobile
kltetmo 4.4.2/KOT49H
G900TUVU1ANCH
G900TUVU1ANCH

Google Nexus 7
ME571KL
Verizon
razorg 4.4.2 / KVT49L
H00_2.42.0_1204
04.02

Google Nexus 10
GT-P8110
N/A
mantaray 4.4.2 / KOT49H
N/A
MANTAMF01

Other toys:

Sony Z Ultra GPE
Motorola Moto G GPE