The update will roll out gradually, which means at first it will be available to a small percentage of users, but don’t worry in coming few days it will reach every unit. Those who are impatient can check it manually by heading
Settings > About Phone > System Update
As we said above it’s an minor update weighs only 13MB in size, this means Nougat is still missing. Last week, OnePlus pushed out the OxyegenOS 4.1 (Android 7.1.1) update to it’s 3 and 3T smartphones.