Fix Facebook Password Reset Loop, Auto-Login & Untrusted Device

The quickest reliable fix is to reset your Facebook password from a web browser (desktop or mobile), clear browser cookies and the Facebook app’s cache/data, then log out of all sessions so old tokens can’t auto-login. For auto-login after logout, remove the Facebook account from your phone’s Accounts, delete saved passwords in Chrome/iCloud/third‑party password managers, clear app data and reinstall; enable 2FA to force reauthentication. If Chrome reports an “untrusted device,” clear browser cookies, allow cross‑site cookies/trackers temporarily (or use a known trusted device to mark this one as trusted), and try the verification again — if nothing works, collect screenshots and submit a Help & Support report.

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Contents

• Fix Facebook password reset loop in Account Center (Android & iPhone)
• Stop Facebook auto-login after logout (Android & iPhone)
• Resolve “Untrusted device” error in Chrome on your phone
• Quick triage checklist — order to try fixes
• When and how to contact Facebook Support (what to send)
• Prevention and maintenance tips
• Sources
• Conclusion

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Fix Facebook password reset loop in Account Center (Android & iPhone)

Why this loop happens (short): Account Center links credentials for Facebook/Instagram and manages shared login state. If cookies, local app tokens, or one linked account’s session are stale/corrupted, the app can accept the verification code but fail to commit the new password to Account Center — then it routes you back to Account Center and repeats the flow.

What to try first (most reliable)

1. Change the password from a browser (best first step)

• On a desktop or mobile browser (not the Facebook app) go to Facebook and use “Forgot password?” — doing the reset in a normal browser session usually bypasses the app’s Account Center loop. Try a full browser (Chrome/Firefox/Safari) rather than the app webview. See a stepwise list of fixes at this developer writeup: https://www.adspower.com/blog/stuck-on-facebook-login-error-fix.
• Enter your email/phone/username, get the code, verify it, and set a new strong password.
• Immediately after success, go to Settings → Security & Login → Where You’re Logged In → Log out of all sessions (this invalidates old tokens).

2. If the browser shows the same loop, clear cookies/site data and retry

• Desktop Chrome/Firefox/Safari: clear cookies and site data for facebook.com, then reload and redo the reset.
• Mobile Chrome (Android) or Safari (iPhone): clear site data — on iOS use Settings → Safari → Clear History and Website Data (or Advanced → Website Data → Remove All Website Data). Izoate’s troubleshooting notes show clearing site data and using incognito/regular browser sessions helps bypass app loops: https://www.izoate.com/blog/how-to-fix-facebook-already-signed-in-error-quickly-facebook-login-loop-explained/.
• After clearing, redo the Forgot Password flow in the browser and set the new password.

3. Clear or reset the Facebook app state

• Android: Settings → Apps → Facebook → Storage → Clear Cache and then Clear Data. (Clearing data removes the local session — you’ll need to log in again.)
• iPhone: Offload or delete the Facebook app (Settings → General → iPhone Storage → Facebook → Offload App or Delete App), then reinstall from the App Store. iOS doesn’t give per‑app cache controls so reinstalling is the equivalent.
• Also clear the Android System WebView app data (Settings → Apps → show system apps → Android System WebView → Storage → Clear Cache), because Facebook’s in‑app flows use the system webview.

4. Break linked-account interference

• If your FB and IG accounts are linked in Account Center, that link can trigger the loop. If you can access Account Center from a browser, temporarily unlink the other account (Settings → Account Center → Accounts) before changing the password. If you can’t access those controls, try the browser reset first (step 1), then manage links after you regain access.

5. Force a full server-side logout

• After successfully changing the password on the web, immediately visit Security & Login → Log out of all sessions (or use the option shown after a password change). That forces every device / app token to require the new password on next sign-in.

6. Turn on 2‑factor authentication (2FA) after you regain access

• Enabling 2FA (Authenticator app or SMS + backup codes) prevents old/stuck tokens from being useful and gives you alternate verification paths if the Account Center flow misbehaves.

7. If nothing breaks the loop

• Collect screenshots of each screen in the flow, record device model, OS and app/browser versions, and submit a Help & Support report (use the app menu → Help & Support → Report a Problem or the Help Center on web). The adspower guide recommends attaching screenshots and describing the loop when contacting Facebook: https://www.adspower.com/blog/stuck-on-facebook-login-error-fix.

Practical tips while you try the above

• Use a desktop browser first; mobile web sometimes inherits the same faulty app/webview state.
• Try a different network (switch Wi‑Fi ↔ mobile data) — network proxies and captive portals can interfere.
• Avoid using Incognito for the final “trust device” step because incognito won’t retain the trust cookie. (You can use incognito just to change password if cookies are causing issues, but mark the final verification in a normal session.)

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Stop Facebook auto-login after logout (Android & iPhone)

Why you’re being logged back in: Facebook stores long‑lived tokens on the device and in web sessions; phone OS account settings, system autofill/password managers (Chrome, iCloud Keychain, Samsung Pass), and connected third‑party apps can silently re‑authenticate the app. Removing the app alone sometimes leaves those tokens intact.

Step-by-step: wipe local tokens and saved credentials

1. Change the password from a browser and log out of all sessions (see previous section)

• This is the fastest server-side way to invalidate most login tokens.

2. Remove the Facebook account from the device (Android)

• Settings → Accounts & backup → Manage accounts (or Settings → Accounts) → find Facebook → Remove account.
• For Samsung devices, also check Samsung Pass for saved credentials.

3. Remove saved passwords / auto‑sign‑in entries

• Chrome (desktop or mobile): Chrome → Settings → Passwords → search for facebook.com → delete the saved password and turn off “Auto Sign‑in”.
• iPhone: Settings → Passwords → search “facebook.com” → Delete. Then temporarily disable AutoFill Passwords (Settings → Passwords → AutoFill Passwords off).
• Check third‑party password managers (1Password, LastPass, Bitwarden) and remove Facebook entries.

4. Clear app data and reinstall

• Android: Settings → Apps → Facebook → Storage → Clear Data/Clear Cache → Reboot phone → reinstall if you deleted the app.
• iPhone: Delete the Facebook app, reboot, then reinstall from the App Store.

5. Revoke app tokens on Facebook

• From the Facebook web (Settings → Apps and Websites) remove apps that are logged in with Facebook. Some third‑party apps keep a valid token that triggers silent reauth.

6. Check in‑app SSO and connected apps

• Some games or services log you back in via a background call. Revoke those tokens as above, or temporarily uninstall the app(s) that may auto‑sign you back in.

7. Final sign-in

• After you’ve removed the device account, cleared saved passwords, cleared app data, and revoked tokens, open the freshly installed Facebook app and sign in with the new password. If the app still auto signs in, make sure your device-level accounts (Android / iOS) have no leftover Facebook entry and that no password manager is set to auto-fill.

Where others ran into the same behavior

• Guides that walk this sequence and highlight saved passwords or account entries are useful — see troubleshooting writeups here: https://beebom.com/facebook-keeps-logging-me-out-fix/ and https://www.izoate.com/blog/how-to-fix-facebook-already-signed-in-error-quickly-facebook-login-loop-explained/.

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Resolve “Untrusted device” error in Chrome on your phone

What that error means: Facebook has flagged the browser/device as unfamiliar and wants extra verification. Normally Facebook sets a persistent cookie or a remembered browser flag after you confirm. If cookies or cross‑site storage are blocked, or if the verification flow can’t write that trusted flag, the browser remains “untrusted.”

How to fix it (ordered)

1. Try a different network first

• Switch to mobile data (or to another Wi‑Fi) to rule out IP‑related checks or network proxies that Facebook may distrust. (adspower lists network switching as a quick diagnostic: https://www.adspower.com/blog/stuck-on-facebook-login-error-fix.)

2. Use a non‑private browser session and clear site cookies

• Close all tabs, clear cookies/site data for facebook.com, then open a normal (non‑incognito) tab and retry verification. Incognito prevents persistent trust storage.

3. Temporarily allow cross‑site cookies / disable tracker blocking

• iPhone Safari: Settings → Safari → turn off “Prevent Cross‑Site Tracking” and ensure cookies are allowed.
• Chrome (Android): Settings → Site settings → Cookies → Allow cookies and turn off “Block third‑party cookies” if enabled.
• Disable any adblockers/privacy extensions that could block Facebook’s verification flow.

4. Use “Trust this device” if offered — or add the device from a known trusted device

• If the checkbox appears after verification, check it (e.g., “Always trust this device”). If it doesn’t, sign into Facebook on a PC or another device you already trust, go to Security & Login → Where You’re Logged In, find the new device and select the option to “Save browser” or mark it trusted if offered (techbloat outlines trusted device steps): https://www.techbloat.com/how-to-find-trusted-devices-on-facebook.html.

5. Use 2FA backup methods

• If your phone is being rejected but you can provide an authenticator code, backup code, or SMS code, use that to complete verification and then mark the device trusted in a normal browser session.

6. If browser-based trust fails, try the Facebook app on the same phone

• Sometimes the app can register the device as trusted and propagate that trust to browser sessions, or at least allow you to change security settings from the app.

7. Last resort: verify identity with Facebook and submit details

• If none of the above registers as trusted, follow the identity verification/appeal prompts in Help & Support and attach screenshots showing the untrusted-device message and the verification path attempted.

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Quick triage checklist — order to try fixes (one‑page)

1. Desktop browser: reset password at facebook.com, then Security & Login → Log out of all sessions.
2. Clear browser cookies/site data for facebook.com (desktop and mobile).
3. Android: remove Facebook from Settings → Accounts; Clear app cache & data; clear Android System WebView.
4. iPhone: delete/reinstall app; Settings → Safari → Clear History and Website Data; Settings → Passwords → remove facebook.com entry; disable AutoFill temporarily.
5. Delete saved passwords in Chrome/iCloud/third‑party password manager and disable auto‑sign‑in.
6. Revoke third‑party app tokens on Facebook (Settings → Apps and Websites).
7. Reattempt verification in a normal browser session (not incognito), allow third‑party cookies temporarily, and mark device trusted.
8. Enable 2FA and store recovery codes.
9. If still stuck, capture screenshots, note OS/app versions, and contact Facebook Support (see next section).

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When to contact Facebook Support (what to send)

When to escalate

• You’ve tried the browser reset, cleared cookies and app data, removed device account, revoked tokens, and you still can’t change the password or you remain logged in automatically.
• The Account Center loop keeps returning you to the same Settings screen despite successful verification.
• The untrusted-device message never allows you to mark the browser as trusted and you can’t complete the flow even with 2FA.

What to include in your support submission (helps FB triage faster)

• Screenshots or short screen recordings of the whole flow (the exact error text, the code input screen, the loop back to Account Center).
• Device model and OS version (e.g., Pixel 6 / Android 13; iPhone 12 / iOS 17.x).
• Browser name and version (e.g., Chrome vXX on Android) or app version (Facebook vX.X.X from App Store/Play Store).
• Time and timezone you attempted the steps and the network used (home Wi‑Fi / mobile data).
• Steps you already tried (browser reset, cleared cache, removed account, reinstalled app, revoked app tokens).
• If possible, the email/phone used for the account (don’t paste passwords).

How to send it

• In the Facebook app: Menu → Help & Support → Report a Problem → Screenshots/Details. If you can access the web, use the Help Center/reporting forms and attach your evidence. The troubleshooting writeups recommend screenshots and a clear description when submitting: https://www.adspower.com/blog/stuck-on-facebook-login-error-fix.

If Facebook asks for identity documents, use the secure upload they provide and follow the instructions. Keep copies of what you send.

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Prevention and maintenance tips

• Keep the Facebook app and your phone OS up to date — many login bugs are fixed in updates.
• Periodically clear app cache and browser cookies for accounts you actively use.
• Use a password manager and store recovery codes for 2FA — that saves time if a device becomes untrusted.
• Enable 2FA (authenticator app preferred), and download/print backup codes.
• Remove unused devices from Account Center and Security → Where You’re Logged In every few months.
• Revoke third‑party app access if you stop using a service (Settings → Apps and Websites).

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Sources

• Stuck on Facebook Login Error? Here’s How to Fix It
• How to Fix Facebook ‘Already Signed In’ Error Quickly: Facebook Login Loop Explained
• How to Find Trusted Devices on Facebook
• Facebook Keeps Logging Me Out: Fixed!
• Reddit: Password Change Keeps Telling Me to Go Account Center to Change Password
• Reddit: Can’t Change Password, Stuck on a Loop (Account Center)
• Reddit: Stuck in “Advanced Protection” Login Loop on Facebook
• How to Recover Your Facebook Password Without Email and Phone Number (Lifewire)

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Conclusion

Break the facebook password reset loop by changing the password in a normal web browser, clearing cookies and app data, and forcing a server-side logout so old tokens can’t auto-login. For persistent auto-login, remove the Facebook account from your device, delete saved passwords (Chrome/iCloud/third‑party managers), clear the app’s data and reinstall. If Chrome calls your phone “untrusted,” allow cookies/trackers temporarily (or add the device from a trusted browser), use 2FA, and, if needed, submit a Help & Support report with screenshots and device details. Follow the ordered checklist above and you’ll normally regain control within one or two attempts.