T-Mobile made a great deal of fuss over its flexible ‘uncarrier’ contracts back in March – clearly separating the cost of the call plan and the handset – but now it’s taking the idea one step further by dropping the upfront cost of the handset altogether.

In what it describes as an “unparalleled” promotion, T-Mobile subscribers will be able to pick up a flagship device such as the HTC One, Samsung Galaxy S4 and iPhone 5 for free. The network operator is then adding most, if not all of the difference to the regular monthly instalments that consumers need to pay to actually own the handset.

There’s some savings to be made here, but it’s essentially just another payment plan. Accept the upfront cost and the user benefits from lower device payments. Forgo the down payment entirely, however, and subscribers have to accept that most of the savings will be added on to their final monthly bill.

As The Verge reports, to put the price difference in perspective the Samsung Galaxy S4 costs $149.99 up-front alongside a $20 monthly fee for two years. Or, a total of $629.99. Under the new $25 tier, with no up-front cost, that comes to $600 exactly. Other handsets, such as the iPhone 5, offer even more negligible discounts.

The promotion is also compatible with T-Mobile’s JUMP! program, enabling consumers to upgrade after six months to a new handset. The catch, however, is that T-Mobile takes subscribers’ existing handsets back, nullifying the payments made up until that point.

“The number of reasons not to switch to T-Mobile this summer is ZERO,” John Legere, president and chief executive officer of T-Mobile US said. “Adding Zero Down in addition to JUMP!, and Simple Choice with no contract is all about making wireless work for consumers and shaking up this industry.”

The scheme is described as a promotion, so it’s fair to assume that it will only run for a short period of time. All of the new monthly payment amounts are listed below – if you’re strapped for cash but looking to switch to a new carrier in the US, this could be a viable option.

  • Samsung Galaxy S4 – $25
  • Samsung Galaxy Note II – $27
  • Samsung Galaxy S III – $22
  • Xperia Z from Sony – $25
  • iPhone 5 – $27
  • Nokia Lumia 925 – $20
  • Nokia Lumia 521 – $5
  • BlackBerry Q10 – $25
  • HTC One – $25
  • Samsung Galaxy Tab 2 10.1 – $20

Image Credit: John Moore/Getty Images