[Samsung Galaxy A20 Guides, News, & Discussion] ossage:
Succeded

Finally managed to root A20e.

I studied the two videos, and from the youtube.com/watch?v=iiPImQT-MuM one derived steps and events. Yet root survived at least two reboot!

What I did:

after messing , reflashed firmware, every slots of it

(how comes masisk manager survived this? and some of custom setting too, some not!)

bootloader has been unlocked

crafted patched boot, flashed using heimdall - I let this auto reboot

reboot drove to

Android recovery fail (no data on recovery_cause#, #Reboot Recovery Cause is [UNKNOWN]#...)

select (factory data reset)

automatic reboot (data cable removed here) (self reboot two times!)

[long time samsung logo image]

initialize phone setup again, add my custom settings here (disable updates, sound, etc)

add wifi again

enable devopts

usb debugging is ok

install magisk manager

run magisk manager

YES to (additional setup)

automatic reboot -> slightly reboots to system without any intervention

run magisk manager

automatically checks for updates -> reports all is update

Here I go for debloating, twrp and custom rom (nice perspective, isn't it?)

Questions left: in Magisk Manager / Advanced Settings / (Recovery Mode) is what for?

My mount looks weird:

a20e:/ # mount

/dev/root on / type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

tmpfs on /sbin type tmpfs (rw,seclabel,relatime,size=1383004k,nr_inodes=345751,mode=755)

/sbin/.magisk/block/cache on /sbin/.magisk/mirror/cache type ext4 (rw,seclabel,relatime,i_version)

/sbin/.magisk/block/system_root on /sbin/.magisk/mirror/system_root type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

/sbin/.magisk/block/system_root on /sbin/charger type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

/sbin/.magisk/block/system_root on /sbin/knox_changer type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

/sbin/.magisk/block/system_root on /sbin/sswap type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,size=1383004k,nr_inodes=345751,mode=755)

devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)

proc on /proc type proc (rw,relatime,gid=3009,hidepid=2)

sysfs on /sys type sysfs (rw,seclabel,relatime)

selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)

tmpfs on /mnt type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=1383004k,nr_inodes=345751,mode=755,gid=1000)

/dev/block/dm-0 on /product type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

/dev/block/dm-1 on /vendor type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

none on /acct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct)

none on /dev/memcg type cgroup (rw,nosuid,nodev,noexec,relatime,memory)

/sys/kernel/debug on /sys/kernel/debug type debugfs (rw,seclabel,relatime)

none on /config type configfs (rw,nosuid,nodev,noexec,relatime)

tmpfs on /mnt/secure type tmpfs (rw,seclabel,relatime,size=1383004k,nr_inodes=345751,mode=700)

tmpfs on /mnt/secure/asec type tmpfs (rw,seclabel,relatime,size=1383004k,nr_inodes=345751,mode=700)

none on /dev/cpuctl type cgroup (rw,nosuid,nodev,noexec,relatime,cpu)

none on /dev/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset,noprefix,release_agent=/sbin/cpuset_release_agent)

pstore on /sys/fs/pstore type pstore (rw,seclabel,nosuid,nodev,noexec,relatime)

none on /sys/kernel/config type configfs (rw,relatime)

adb on /dev/usb-ffs/adb type functionfs (rw,relatime)

tracefs on /sys/kernel/debug/tracing type tracefs (rw,seclabel,relatime)

/dev/block/mmcblk0p29 on /omr type ext4 (rw,seclabel,nosuid,nodev,noatime,journal_checksum,noauto_da_alloc,i_version)

/dev/block/mmcblk0p28 on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,i_version)

/dev/block/mmcblk0p32 on /data type ext4 (rw,seclabel,nosuid,nodev,noatime,journal_checksum,noauto_da_alloc,resgid=5678,i_version)

/dev/block/mmcblk0p3 on /mnt/vendor/efs type ext4 (rw,seclabel,nosuid,nodev,noatime,journal_checksum,noauto_da_alloc,i_version)

/dev/block/mmcblk0p5 on /mnt/vendor/cpefs type ext4 (ro,seclabel,nosuid,nodev,noatime,journal_checksum,noauto_da_alloc,i_version)

/dev/block/mmcblk0p4 on /efs type ext4 (rw,seclabel,nosuid,nodev,noatime,journal_checksum,noauto_da_alloc,i_version)

tmpfs on /storage type tmpfs (rw,seclabel,nosuid,nodev,noexec,relatime,size=1383004k,nr_inodes=345751,mode=755,gid=1000)

/sbin/.magisk/block/product on /sbin/.magisk/mirror/product type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

/sbin/.magisk/block/vendor on /sbin/.magisk/mirror/vendor type ext4 (ro,seclabel,relatime,block_validity,discard,delalloc,barrier,user_xattr,acl,i_version)

/sbin/.magisk/block/data on /sbin/.magisk/mirror/data type ext4 (rw,seclabel,relatime,journal_checksum,noauto_da_alloc,resgid=5678,i_version)

/sbin/.magisk/block/data on /sbin/.magisk/modules type ext4 (rw,seclabel,relatime,journal_checksum,noauto_da_alloc,resgid=5678,i_version)

none on /dev/freezer type cgroup (rw,relatime,freezer)

/data/knox/secure_fs/enc_media on /mnt/shell/enc_emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1000,fsgid=1000,gid=9997,multiuser,derive_gid,default_normal,reserved=20MB)

/data/media on /mnt/runtime/default/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid,default_normal,reserved=20MB)

/data/media on /storage/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid,default_normal,reserved=20MB)

/data/media on /mnt/runtime/read/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=23,derive_gid,default_normal,reserved=20MB)

/data/media on /mnt/runtime/write/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=9997,multiuser,mask=7,derive_gid,default_normal,reserved=20MB)

Where is system to remount rw to add some tweaks and mods?