T-Mobile will move to a no-contract model on March 24, with an announcement as early as Monday -- that is, if a story on blog TmoNews pans out. In reporting the shift, Tmo cites an unnamed source -- "while we're confident the details are accurate today, they could easily change tomorrow," it says -- and it adds that T-Mobile will also ditch early termination fees ("which makes complete sense when announced with the removal of contracts"). It also reports that the carrier will offer a monthly installment plan on handset purchases that will be in the $25 to $30 range.