The Xiaomi Mi A1 – the Android One mobile gets September Security Patch Update Now.
The size of the update is about 1059 MB, which is recommended to update over Wi-Fi.
The change log says that, the September Security update enhances the security, fixes the bugs, improves the device stability and optimizes the performance as well.
The September Security patch also brings fix for the critical BlueBorne Bluetooth vulnerability.
The update is rolled out as OTA, however uses can manually update Mi A1 by option: Go to Settings> About Phone> Software update and check for the updates.