The shared data plan, initially available to only four smartphones in Virgin's lineup, will allow individuals to customize on the fly how much data each member users.
Nikesh Arora, who previously served as chief business officer at Google, will lend some of his tech experience to the struggling wireless carrier.
The carrier will also offer up to $350 per line to T-Mo subscribers to cover costs related to switching networks.
The move could be the next step in Google's ever-widening ambitions to conquer the mobile world.
In a surprise move, Sprint counters its industry brethren by saying the FCC's plan won't prevent it from further investing in its broadband network.
The carrier ups the ante again with its iPhone-leasing program that starts at $30 a month and allows customers to swap in a new device each year. The offer takes effect on November 14.
As all the carriers duke it out for consumers' affections, the gains last quarter keep Sprint just ahead of T-Mobile in terms of total customers.
LG's uniquely curved, slightly bendable smartphone gets some US carrier love.
A federal consumer protection agency is suing Sprint over allegations that it allowed third-party companies to "cram" customers' bills with fraudulent charges.
The Lumia 635 will sell for $100 online through Sprint's prepaid arm, Boost and Virgin, starting December 23.