An anonymous reader writes from a report via The Next Web: T-Mobile plans to boost its LTE speeds to up to 400 Mbps in the very near future. The Next Web reports: "The company is getting ready to boost its maximum theoretical internet speeds to become the faster carrier in the U.S. by a wide margin. The network will soon support theoretical speeds up to 400 Mbps -- nearly half the speed of Google Fiber. There's a two-pronged approach to the upgrade. First is incorporating 4x4 MIMO (multiple input, multiple output) technology, which will supposedly double the speed from the current 7-40 Mbps customers tend to experience with T-Mobile (about the same as Verizon with LTE-A). This upgrade is available now in 319 cities, although it's a moot point because only the S7 and S7 Edge will be able to use the tech via a software update "later this month." In October, the company will roll out 256 QAM support to the S7 and S7 Edge (and again, more phones later), which increases the amount of bits per transmission. T-Mobile says this will lead to theoretical maximum speeds of 400 Mbps." The Next Web followed-up with T-Mobile to ask about what the real-world speeds would be after the upgrade. The company says "customers can expect to see real world peak speeds of 190 Mbps," which is over four times current peaks speeds, but also far below the theoretical 400 Mbps.