Christine_ASUS1. I have never repaired or opened my phone in neither service center nor outside. Never changed motherboard.
As your previous thread, both of your CTS and Google Play Store certification are fail, leading to contradict the apps involving security authorization such as Netflix.
As I mentioned before, my device doesn't have the same issue after upgraded from Android 9 to V438 (To test other issues, I had switched my device between Android 9 and Android 10beta for more than 5 times yet I have never faced a certification issue), please downgrade your device to Android 9 and upgrade again, then wait one week for system synchronization. (Remember to backup the data first.)
Please avoid any overlapping thread or message, which may disturb the mods and the users to solve the issue.
1. Have you ever repaired your device or change your motherboard before? If so, please provide me your ASUS RMA no. for further checking.
2. Have you ever flashed custom rom/flashed wrong firmware/rooted/unlocked your device before?