> For the complete documentation index, see [llms.txt](https://help.adalo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.adalo.com/publishing-apps/publishing-to-the-apple-app-store/submit-your-build-to-the-app-store/apple-two-factor-authentication-error.md).
# Apple Two-Factor Authentication Error
**Issue:**\
When attempting to push a build in Adalo, you may encounter the following error: Verification codes can’t be sent to this phone number at this time. Apple has phased out SMS-based authentication as a primary method for Two-Factor Authentication (2FA) to improve security.
**Cause:**\
This error occurs when there are no trusted Apple devices associated with the account that can receive verification codes. Apple requires at least one trusted device to authenticate via Two-Factor Authentication (2FA). As a result, users must have at least one **trusted Apple device** linked to their Apple ID to receive verification codes. If no trusted devices are available, authentication will fail.
**Resolution:**\
To resolve this issue, you must add the developer email account to an iOS device to enable 2FA code reception.
1. Open **Settings** on an iOS device.
2. Navigate to **Apps** > **Mail**.
3. Select **Mail Accounts**.
4. Tap **Add Account** > **iCloud**.
5. Sign in with the developer email account associated with your Apple Developer account.
6. Once the account is added, the device should become a trusted Apple device.
7. Attempt to push a new build in teh Adalo Builder.
After completing these steps, you should be able to receive the required verification codes and proceed with authentication successfully.
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