Project Fi version of Nexus 6 will receive Android 5.1.1 very soon7
The Nexus 6 is equipped with a 6-inch, 1440 x 2560 resolution screen (protected by Gorilla Glass 3) which works out to a 493ppi pixel density. The Snapdragon 805 SoC is under the hood, featuring a quad-core 2.7GHz CPU and the Adreno 420 GPU. 3GB of RAM is inside along with 64GB of non-expandable storage. A 13MP camera with OIS is on back while a 2MP front-facing snapper handles selfies and video chats. Keeping the power running is a 3220mAh battery, and the phablet is nanocoated to protect it from splashes and sudden downpours.
While those who already own the Nexus 6 can use it for Project Fi, a special SIM card will need to be inserted. One of the cool things about Project Fi is that the phone uses a special algorithm to decide which of the two carrier's networks it employs, is the best to use at any given moment.
Google has been inundated with requests for invitations to subscribe to its MVNO and is expected to be caught up soon.
source: @projectfi via AndroidCentral