diff --git a/android.org b/android.org
index ea9dacf..4b69339 100644
--- a/android.org
+++ b/android.org
@@ -89,6 +89,14 @@ Tutorial: https://www.youtube.com/watch?v=3pxOeiIBrHI
 | Titanium Backup PRO |             | [[https://github.com/machiav3lli/oandbackupx][OAndBackupX]]             |
 
 * Tutorials
+** Backup
+I use =adb backup= to backup the phone ([[https://forum.xda-developers.com/t/guide-full-phone-backup-without-unlock-or-root.1420351/][guide]]).
+
+Basically, I have to run:
+#+begin_src bach :eval no
+adb backup -apk -shared -all -f ~/Cloud/android/backup/backup_$(date +"%Y_%m_%d").ab
+#+end_src
+
 ** Connect to the phone by SSH
 https://wiki.termux.com/wiki/Bypassing_NAT