I Am Trying To Test My APK File Into Redmi 5A And It’s Saying App Not Installed And I Have Tried With Different Android Version 4.4,5.0,5.1,5.2,8.0,8.1, But It’s Not Working And I Have Never Installed This App Before And Also Disabled Play Protect In All Case It’s Saying App Not Installed
I also face this problem. Basic this problem is in old Redmi phone becoz Redmi now not give update for old Redmi phone. I know the problem. So goto mi store or play store and update your package installer it will fix
Make sure you are using latest package installer.