If UNDECEMBER Android 16 Crashing is sending you back to your home screen, start by checking the installed game version. LINE Games completed the minimum operating-system update on 28 October and instructed players to fully close and restart the game to apply it. Start with your Android version and Google Play app version if the game shuts down during launch.
An app crash is different from a stuck download or a connection error. The steps below are for the game closing at launch or during loading. If it stays open and shows a server error, jump to the login checks instead.
UNDECEMBER Android 16 Crashing: First five checks
- Check Settings, About Phone, Android Version. The game needs Android 16 or newer.
- Open Google Play and install the latest UNDECEMBER version, including the mandatory update associated with the 30 October patch where available.
- Completely exit the game from recent apps and reopen it, as the developer instructed after its 28 October data patch.
- Restart the phone if the game still fails to launch.
- Check that there is adequate free storage for game updates and temporary files.
For UNDECEMBER Android 16 Crashing, update the app and restart it before changing settings. Android 15 no longer meets the game’s minimum, so check the Android requirements if your phone hasn’t received Android 16.
Is UNDECEMBER crashing or failing to log in?
If the app disappears and sends you to the Android home screen, that is a crash. If the game stays open and shows an error about authentication, connecting or maintenance, it’s a different problem. The second case belongs in our mobile login troubleshooting, not a crash fix.
If UNDECEMBER Android 16 Crashing continues after the update, close demanding apps, check for free storage and restart your phone once. Don’t clear app data or uninstall until you know the account that holds your characters.
Is UNDECEMBER Android 16 Crashing listed as a known issue?
As of the October 28 update to the known-issues notice, LINE Games listed a Nix pet appearance and Auto Loot issue, plus quiet sound effects from a particular skill skin. It also confirmed that a Google Play payment problem was resolved on October 28. There is no current listing for a general Android 16 startup crash.
In April 2026, the developer reported force closes in certain Android environments, including Chaos Dungeons, then announced an April 25 update fixing intermittent Android force closes. That event is historical. It should not be described as still affecting Android 16 devices in October without new evidence.
What changed in the October update?
The 28 October data patch was carried out without separate server maintenance. LINE Games warned of brief stutters and disconnections, with a roughly ten-minute window affecting certain activities around the scheduled patch. That temporary window is over. A crash now requires a fresh diagnosis, not an assumption that the patch interruption continues indefinitely.
If the game cannot finish updating, use our Android install guide. If Google Play labels the device incompatible, our device compatibility guide explains why Android 16 and supported hardware are different requirements.
How to report UNDECEMBER Android 16 Crashing to LINE Games
Record the device model, Android version, app version and the exact screen or activity where it closes. LINE Games asks players to submit bug reports via its 1:1 in-game Customer Support with screenshots or video where possible. If the game will not open at all, use the publisher’s official support channel rather than random third-party repair tools.
The UNDECEMBER Android 16 Crashing checklist ends with a support report if the game still closes: include your model, Android version, app version and the screen on which the crash occurs.
Related Guides
Official source: LINE Games’ completed Android patch notice.
