If you're still logged in to your account, you can remove your phone from your Mobile settings on twitter.com. Click Delete my phone and login verification will be automatically disabled for your account.
If you are enrolled in login verification for iOS or Android and you generated a backup code, enter the backup code to access your account and update your Mobile settings.
If you are no longer logged in to your account and do not have access to an active backup code, please contact Support for assistance.
I bought a new phone!
Be sure to back up your old phone before you replace it. This will allow you to restore your app session on your new device, so you can continue to use login verification. Note that if you're a Twitter for iOS user, we recommend you do an encrypted backup to preserve your app key. Typically, iCloud backups alone do not preserve the key and without an encrypted backup, you may be required to log back into your app using a temporary password generated on twitter.com
You can also unenroll from login verification on your old phone, or from twitter.com if you have an existing open web session. If you do not have an open web session and you do not have your old phone, you can still log back in to twitter.com using your backup code.
It says my phone number is associated with a different account.
Text STOP to your Twitter code to free up your number from the other account. Then try adding your phone again.
Still need help? Check out this article to find out which Twitter account your phone is connected to.
I can't log in on my phone.
Adjusting your mobile settings may help with this issue. Log in to twitter.com from a desktop or laptop computer. If you don’t receive a push notification, you can choose to receive your login code via SMS by updating your security and privacy settings. Visit your mobile settings tab to make sure your phone number is up to date.
Alternatively, try signing out of your account from the device you used to enroll in login verification. This will disable it, and you can then sign back in with your username and password. Visit these articles for sign-out instructions: Twitter for iOS or Twitter for Android.
I didn't receive the push notification.
Check that you have enabled mobile notifications. You will not receive a login push notification if you do not have mobile notifications turned on for your device.
You can always check your recent login requests from within your app. From the Me tab, tap on the gear icon and select Settings, and then tap Login Requests to see a list of all requests available to approve or deny. Pull down on the list to refresh the page to see most recent requests.
I get an error when I try to use my backup codes.
If you attempt to login using an inactive backup code, or attempt to use a backup code out of order, you will see an error message. You will need to unenroll from login verification on your device, re-enroll, and then generate a new backup code to log in.
Note that your backup codes will only work when logging in to twitter.com; if you're trying to access mobile.twitter.com, Twitter for iOS or Android, or another Twitter client, you'll need to use a temporary password instead of your backup code.