U.S. carrier T-Mobile announced an new Simple Starter value plan yesterday that will cost $40 a month for unlimited talk and text and up to 500MB 4G LTE data and tethering. The new plan will be launched on April 12th. 

In addition, the company today launched Operation Tablet Freedom, a program that lets subscribers to add a tablet to their postpaid voice plan for free. Beginning April 12th, customers can get nearly 1.2 GB of free 4G LTE data every month through 2014 on operator's nationwide LTE network.

T-Mobile is now offering upgrade to a 4G LTE-enabled model for Wi-Fi-only model price, with any postpaid activation on a 1GB or more mobile internet plan with no annual service contract. For example, customer will pay the Wi-Fi price of $499 instead of $630 for the 4G LTE-enabled 16GB iPad Air or will pay the Wi-Fi price of $200 instead of $312 for the 4G LTE Samsung Tab 3. Voice customers adding the 1GB tablet plan for free for the rest of 2014 also fully qualify for these reduced prices.

And, for both new and existing customers, T-Mobile is offering $10 off its most popular internet data plans starting April 12th through the end of 2014. Voice customers can get up to 1GB of 4G LTE data free every month through the end of the year.