Microsoft has not yet given up on its Lumia project and they are even still rolling out updates to the device. With the Lumia 950, an update that allows you to double tap on the screen to wake it (more like the screen knock feature on android) was rolled out in a new update.
The update was initially gotten by those using only the single SIM variant of the device and now, the same update is already available to the users of the double SIM variant in the United States also, just less than a month after it featured in the former device.
The update comes as an Over the Air package and can be obtained by just going to your Windows Device Recovery Tool in the phone settings.
Microsoft had earlier received a lot of requests from users to include this feature in the smartphones and after conducting a public voting session, there is no doubt a huge percentage of those voters went for the change for it to be feasible now.
Asides the double tap to wake, the update also improves the performance of the Wi-Fi, device Bluetooth, cameras, connectivity, its audio to mention but a few.