There are 4 scenarios in [Oppo] Master Clear operation
For easy understanding, will explain by using two popular user lock issue in Android,
There is a User Lock (Pin/Passcode) and FRP (Google Account).
And we have also User Data Files: User Apps(include contact and SMS), and Media Files(music, pictures, videos)
1. Wipe Data & App:
This will clear User Lock (Pin/Passcode), and FRP (Google Account), User Apps but will not remove media files.
2. Wipe Data Only:
This will clear User Lock (Pin/Passcode), but not remove FRP (Google Account), and Media Files.
3. Wipe App Data:
This will not Clear User Lock (Pin/Passcode), but will bypass FRP (Google Account). All User Apps and Media Files will stay intact.
4. Format Data:
This will clear User Lock (Pin/Passcode), User Apps and Media Files, but not remove FRP (Google Account).
From the description above, you can adjust according to your customer's needs, and negotiate the highest costs possible.