Update: These changes are now officially listed on T-Mobile's Galaxy S7 and the Galaxy S7 edge support pages.
T-Mobile was supposed to send out a maintenance update for the Galaxy S7 and the Galaxy S7 edge a couple of days ago. However, the update was pulled by the carrier at the last minute for reasons still unknown to us. T-Mobile has now started sending out a fresh update to both devices, with the update already reaching devices as well.
It weighs about 164MB, so it's not a minor update. In terms of changes, there's no mention of the power and volume button fixes that was talked about two days ago, but the changelog does mention the addition of FM Radio support with this update. This comes along with the usual slew of security patches. Have you received the update yet? Sound off in the comments below.