How to install SE GSI on rosy
1. Download a DPI Changer APK and put it in internal storage.
2. Download Magisk and put it in internal storage.
3. Wipe everything without internal storage.
4. Install treble rom (CardinalAOSP & AEX not working, use PE Oreo)
5. Wipe cache, data and system
6. Restore SE system only
7. Mount Vendor and System
8. Install two SE patches
9. Flash GAPPS (pico, 8.1 is OK)
10. Flash Magisk.
11. Mount vendor and put this dwo files (build.prop and default.prop) in /vendor
12. Mount System
13. Go to TWRP File Manager and /system/priv-app and delete folder named Wingsetupwizard
14. Reboot
15. Install DPI Changer via files
16. Grant root and change resolution to 1440x2160
Now all will be OK
WiFi not connecting, you need to connect via WPS Button