Rumors have it that T-Mobile under its new "Uncarrier" plan will pay users to switch from their current network to join the carrier.

Once the subscriber terminates his contract with the current carrier and signs with T-Mobile, he can submit the final bill and the early termination fee to T-Mobile, which will reimburse the money in credit to cover the cost.

In the tweet sent out earlier this week, T-Mobile's John Legere teased the company's upcoming plans.

#ItsAboutCustomers -Time to eliminate another customer pain point? Time for #Uncarrier4? Yes it's time! Stay tuned...Happy New Year #Randall

- John Legere (@JohnLegere) December 18, 2013

"He's teasing a project code named 'Houdini' which will give switchers up to $350 in credit when they switch to TMO. Emphasis will be on families switching up to 5 lines regardless of contract end dates," a source told Tmo News-the unofficial T-Mobile blog. "New customers will receive instant credit when they trade in a smartphone, then get a credit for the ETF charged by their old carrier when they submit the final bill to TMO."

Though all this is unconfirmed for now. T-Mobile earlier extended an invitation to all customers to an event at CES next month, at which it will unveil Uncarrier 4.0.

Earlier last week, Wall Street Journal reported that Sprint was eyeing the fourth largest U.S. carrier in an attempt to acquire a stronger user base in the shrinking wireless carrier market in America. The T-Mobile acquisition will give a boost to Sprint user-base, which has been losing its customers. Since both the companies are working on expanding the 4G LTE network in the U.S., the merger can work in favour of users looking for a reliable network and faster data speed. Despite the merger, Verizon will stay on top of the charts with a 101.2 million subscriber base (till October). T-Mobile and Sprint user-base will increase to about 53 million contract subscribers.