Google recently updated its Nexus 5 and Nexus 6 with Android Lollipop and now Google started rolling out Android 5.0.1 for the US variants of aforementioned devices.
T-Mobile started rolling out update from today. In order to get update from T-Mobile your Nexus 5 or Nexus 6 should be running on Lollipop build LRX210. T-Mobile build of latest bug fix update is LRX22C.
Like every update there are few requirements which customers should meet before start updating their devices. First of all check you battery status which should be at least on 50% before starting download. Although update is not of big size it weighs at 13.3 MB.
It’s not necessary to be hooked up to a WI-FI instead you can update using cellular mobile data. Like earlier updates you will see an update notification. As usual, the update won’t be rolled out at one go, it will be rolled out on a flabbergasted basis. If you didn't receive notification yet, you probably will get it by tomorrow.