While scouring inside the Project Tango tablet we came across this Nvidia NB106-N baseband module.

It looks like Google wanted to use an off-the-shelf module so that they could easily deploy the Tango tablet in multiple regions that have different network certifications.

Notable ICs on the baseband module:

Nvidia ICE9245B-C2 low-power, multi-mode RF transceiver

Micron 3PA98 JW806 NAND-based MCP

Nvidia Icera ICE9045T-A2 LTE Modem

Texas Instruments TPS659121A PMU for Processor Power

Skyworks 77621-11 Multimode Multiband Power Amplifier Module