The company is directly updating the device to version 8.1. August 2018 Security patch along with Samsung Experience UX 9.5 is also bundled alongside.
As usual, the update is rolling over-the-air so it will take time to reach every unit. Those who are impatient can head over to the Setting’s menu of their perspective devices to manually check for the update.
Before downloading the update make sure your device is charged up to 80 percent and is connected to a decent internet connection.