Samsung has started rolling out the Android 9.0 Pie beta update based on One UI to the Galaxy A7 (2018). Owners of the phone can register for the Android Pie/One UI beta program in India, as the over-the-air update has already started rolling out.
The Galaxy A7 (2018) is the first mid-range phone that Samsung started testing Pie for. While Samsung has not officially announced anything about the beta update, screenshot for the Pie beta OTA on various forums act as proof for the reports that Samsung is indeed rolling out the Pie beta update and allowing owners of the phone to test the next version of Android.
If you are an A7 (2018) user, head over to Samsung Members app and go into the Notices section. Here, you would see a notification of the beta program. list. Tap that, then use the Register button to enroll in the beta. Once you’ve registered, you should be able to download the first Pie beta from the Software update menu of the Settings app by tapping the Download updates manually option. The first beta includes the February 2019 security patch.