T-Mobile has officially completed its merger with Sprint. For the moment, the merger has little effect on customers, but "Sprint" lives only as a brand of T-Mobile, not a separate company. As of today, Sprint is no longer trading under its own symbol on the stock exchange. Current Sprint customers can keep their plans for the near future. As a condition of regulatory approval, T-Mobile has committed to not raise prices for three years. But over time, the Sprint brand will be replaced by T-Mobile. The companies have been making technical preparations for the merger since it was announced. Most new phones introduced by Sprint and T-Mobile in the past year are capable of accessing both networks, ensuring a smoother transition. The companies have already announced expanded roaming for Sprint customers on the T-Mobile network, for Sprint customers with those newer phones. While all major US wireless carriers are deploying 5G in both sub-6 GHz and mmWave radio frequencies, the new T-Mobile will have the key advantage of access to mid-band frequencies in the form of Sprint's unique band 41 (2.5 GHz). 5G in this band can offer a unique balance between high speeds (like mmWave) as well as broad coverage (like other sub-6 bands). The company claims that combining the two networks into one will allow the company to offer "14 times more capacity in the next six years than T-Mobile alone has today", "average 5G speeds up to eight times faster than current LTE in just a few years", and "$43 billion in synergies for all shareholders", mostly from "reducing redundant cell sites and rapidly deploying spectrum and other technologies more efficiently." The new company announced plans to invest "$40 billion into its network, business and more over the next three years." The company also announced that Mike Sievert will replace John Legere as T-Mobile CEO effective today, one month earlier than previously announced.