T-Mobile USA, the nation’s fourth-largest wireless company and the sole major U.S. carrier without the iPhone, today announced new unlimited “4G” data plan, as promised last month. The new plan will set you back $20 a month if you’re on T-Mobile’s Value plan or $30 a month for those on the Classic voice and text plan.

The new plans do away with speed limits or bandwidth throttling, the carrier said. Though T-Mobile continues with its dubious practice of advertising its network and these new plans under the “4G” moniker, in the carrier’s terminology this really means iPhone-compatible high-speed 3G HSPA+ as T-Mobile is way overdue with 4G LTE deployment

According to a media release, a single line Value plan with unlimited talk and text combined with unlimited nationwide 4G data will cost $69.99 a month. Likewise, a single line Classic plan with unlimited talk, unlimited text and unlimited nationwide 4G data will cost $89.99 a month.

Seventy bucks a month for unlimited everything, not bad.

Existing customers on Classic or Value plans can simply upgrade their service by adding an Unlimited Nationwide 4G Data plan.

T-Mobile appears to have joined carrier Sprint in offering unlimited data as both Verizon and AT&T have been recently pushing their new shared data plans.

http://www.youtube.com/watch?v=j0eML7aphSc

As for the iPhone, T-Mobile most likely won’t be getting Apple’s sought-after device this year. The carrier allegedly will install unlocked iPhone displays¬†in stores,¬†a part of its ‚ÄúBring Your Own iPhone‚ÄĚ campaign meant to encourage unlockers to try out¬†3G data on their iPhones¬†and demonstrate its refarmed network.

It was also reported yesterday that T-Mobile started distributing iPhone-friendly nano SIM kits to retailers in anticipation of the next iPhone launch on September 12.

To get more details on T-Mobile’s Unlimited Nationwide “4G” Data plan, head over here.

What do you think of this unlimited “4G” data option from T-Mobile?