Accounts cannot be saved

The game has shut down, so accounts can no longer be saved.

Japan’s server stayed available for several months but has also become inaccessible at the end of October.

Warning about chats: only the last 20 messages in each chat group are saved.

How to find your UUID

Android emulator or rooted Android

1. (In your emulator’s settings, enable root (superuser) access.)
2. In your phone’s files, find the /data/data/com.bandainamcoent.digimon_linkz/shared_prefs directory.
3. Open the file named com.bandainamcoent.digimon_linkz.v2.playerprefs.xml.
4. Search for “uuid”. You will find something similar to:

   <string name="uuid">U%2FD%2F09U%2BiGw6TobdtT5F3wAkNZd2X5c67tftwhOrd2ypbInAp64XO0ZfEkohnfq0</string>

5. Copy the long string of letters and digits (and percent signs) into the account-saving tool as the “UUID”.

Android 6 or below (without a computer)

1. Close Digimon Linkz from the phone’s task switcher if it is already running (or reboot the phone).
2. If you have a proxy server configured, disable it. (If you can’t access the Internet without it, use a different method.)
3. Install Packet Capture.
4. Open Packet Capture’s settings and install the CA certificate.
5. On Packet Capture’s main screen, press the green “Play 1” button.
6. From the list of apps, select ﾃﾞｼﾞﾓﾝﾘﾝｸｽ.
7. Launch Digimon Linkz and wait until the title screen loads and your user code appears in the corner.
8. Switch to Packet Capture.
9. Press the red “Stop” button.
10. Tap the line that shows the current date and time (in the list on Packet Capture’s main screen).
11. Tap the first item in the list.
12. Find a line that starts with x-uuid: The rest of the line has a long string of letters, letters and dashes.
13. Type (or copy & paste) this string of letters, digits and dashes into the account-saving form. as the “UUID”
14. (You can now uninstall Packet Capture, delete the CA certificate and, if you were forced to change them, restore your lock screen settings.)

iOS (any version) or Android 6 or below (on Wi-Fi with a computer)

1. Close Digimon Linkz from the phone’s task switcher if it is already running (or reboot the phone).
2. On your computer, install a capturing HTTPS proxy such as mitmproxy or Fiddler.
   • mitmproxy has binaries available for all modern platforms.
   • mitmproxy can also be installed via pip or Docker.
   • Fiddler needs to be configured to decrypt HTTPS traffic and allow remote connections.
3. Launch the proxy on your computer.
   • For mitmproxy, open a terminal/command line window and use either mitmproxy or mitmweb.
4. Find out (or explicitly configure) the proxy’s port number.
   • For mitmproxy, the default is 8080.
   • For Fiddler, this is set on the “Connections” tab in Fiddler Options.
5. Find out your computer’s local IP address.
   • guide for Windows
   • guide for macOS
6. Configure the phone to use the proxy.
   • guide for iOS
   • guide for Android
7. Install the proxy’s certificate on the phone.
   • mitmproxy guide
   • Fiddler guide for iOS
   • Fiddler guide for Android
8. Launch Digimon Linkz and wait until the title screen loads and your user code appears in the corner.
9. In the proxy, select the line that says “…AuthUserByUuid”.
10. Find “x_uuid”. It is followed by a string of 32 letters and digits separated by dashes.
11. Copy this string of letters, digits and dashes into the account-saving tool as the “UUID”.
12. (You can now uninstall the proxy from your computer, delete the CA certificate from your phone and, if you were forced to change them, restore your phone’s lock screen settings.)

Android 7 or above (unrooted) (for advanced users)

1. Install ADB of a version that matches your phone, or an Android app that allows backing up other apps.
2. Back up Digimon Linkz (com.bandainamcoent.digimon_linkz).
3. Transfer the backup file to your computer (if applicable).
4. Extract the backup file and find the apps/com.bandainamcoent.digimon_linkz/sp/com.bandainamcoent.digimon_linkz.v2.playerprefs.xml file within it.
   • Using android-backup-extractor:

     java -jar path/to/abe.jar unpack path_to/backup.ab path_for_generated/backup.tar

     and then open backup.tar in an archiver. This supports MIUI backups as well.
   • Using android-backup-extractor in a UNIX shell:

     java -jar path/to/abe.jar unpack path_to/backup.ab - | tar x apps/com.bandainamcoent.digimon_linkz/sp/com.bandainamcoent.digimon_linkz.v2.playerprefs.xml

     This supports MIUI backups as well.
   • Using a Bourne-compatible UNIX shell:

     if [ "`head -3 path_to/backup.ab | tail -1`" = 1 ]; then { printf "\x1f\x8b\x08\x00\x00\x00\x00\x00"; tail -n +5 path_to/backup.ab; } | gzip -cd; else tail -n +5 path_to/backup.ab; fi | tar x apps/com.bandainamcoent.digimon_linkz/sp/com.bandainamcoent.digimon_linkz.v2.playerprefs.xml

5. Open the com.bandainamcoent.digimon_linkz.v2.playerprefs.xml file.
6. Search for “uuid”. You will find something similar to:

   <string name="uuid">U%2FD%2F09U%2BiGw6TobdtT5F3wAkNZd2X5c67tftwhOrd2ypbInAp64XO0ZfEkohnfq0</string>

7. Copy the long string of letters and digits (and percent signs) into the account-saving tool as the “UUID”.