For those with Gallery viewing problem, enable com.samsung.cmh.
Try Dual SIM Selector Pro
I made some corrections in the file sent by stayawake
I use this way to move system folders:
mount -o remount,rw /system /system
mv "/system/app/Exchange2" "/system/app/___Backup"
mv "/storage/emulated/0/Download" "/storage/sdcard1/Download"
Check if you have a file "disable" on /data/data/de.robv.android.xposed.installer/conf/
Delete if you have