Oppo rolling out the April 2020 security patch with ColorOS 7 update for Oppo A9 May 3, 2020 by Aman Tiwari Oppo has officially rolling out the ColorOS 7 stable Android 10 and April 2020 security patch update for the Oppo A9 smartphone users. The latest update brings version number CPH1938EX_11_C.21 and the size of this update is 400 MB.
