T-Mobile’s newest ploy to gain customers is called Data Stash, an initiative that lets you roll over unused data from one month to the next.

CEO gere announced the move in a broadcast with Yahoo Tech, throwing out his usual barbs against competitors railing against a “broken, arrogant industry.”

It was dubbed Uncarrier 8.0, a follow-up to other events where gere announced the elimination of two-year contracts, subsidies, simplified pricing.

th Data Stash, Simple Choice plan customers start in nuary with 10GB, which rolls over from one month to the next along with any unused data. Any data not used within one year expires.

The plan is akin to the days of rollover minutes, when carriers used to do the same for talk time. But it’s data that customers now crave— carriers bank on for income. gere said in the interview the wireless industry makes $1.5 billion on data overage charges annually.

“I know you can’t swear on this station, but it scares the s–t out of people,” he said.

gere also used the broadcast to tout T-Mobile’s rollout of deb E in New York City the expansion of its E network to cover 300 million Americans by the end of the year. 

T-Mobile is still working to change the perception of its network quality. gere argued that his company’s network is faster than those of AT&T, Verizon, or Sprint. He repeatedly referred to his competitors as rry, Moe, Curly of The Three Stooges.

He said other potential customers need to be convinced T-Mobile has the top smartphones a strong-enough network.

“It’s some schmo that doesn’t think we have the ione that our network blows,” he said.

T-Mobile is broadening its E coverage retiring its 2G network, which he says can be accomplished without a substantial buildup of more towers.

y this matters: T-Mobile’s Uncarrier initiatives have been popular, such as its Music Freedom plan that doesn’t count music streaming against one’s data plan. ile its plans are great, T-Mobile’s Achilles’ heel remains exping its network to better match the vast reach of mobile kings Verizon AT&T.