The message can follow a recent phone change, cloud session or actual unauthorized access. Do not ignore it if you do not recognize the device.
Short answer: Stop play, secure the linked email or platform account, revoke other sessions and change the game password where supported.
Check the likely cause first
- Review device and session lists on every linked provider.
- Check the time, location and device shown in security alerts.
- Ask whether an old phone, emulator or family device is still signed in.
Fix it in the safest order
- Sign out other sessions using official account settings.
- Change reused passwords and enable multi-factor authentication.
- Remove unknown linked providers and verify recovery details.
- Contact support if the game does not expose session controls.
Before changing storage, account or network settings, confirm that the game came from its official store listing. WP Phone does not recommend modified APKs, unofficial top-up pages or account sellers.
How to confirm the fix
Restart and sign in once on the trusted device, then watch for another-device alerts over the next day.
What not to do
- Do not share screenshots containing recovery codes.
- Do not approve unexpected sign-in prompts.
When to contact support
Ask the publisher to freeze transfers or purchases if an unknown session changed inventory or account details.
Use the official game directory to verify download routes, and review the safe download checklist before reinstalling.