Why can't I log in to YouTube and Google Drive with my Gmail on a new iPhone?

If you're having trouble logging into YouTube and Google Drive on your new iPhone with your Gmail, it's likely due to security measures like two-factor authentication (2FA) requiring verification or outdated app versions. 

Here's a breakdown of potential causes and solutions:

1. Two-Factor Authentication (2FA) Verification:

• What it is:
• If you have 2FA enabled on your Google account, you'll need to verify your identity before accessing your apps on the new device. 
• How to resolve:
  • Check for prompts: When you try to sign in, look for prompts on your old device (where 2FA is already set up) or via SMS/email. 
  • Use a security key: If you have a security key linked to your account, use it for verification. 
  • Use backup codes: If you can't verify via other methods, use backup codes if you have them. 
  • Verify via SMS: If you have a recovery phone number, you can verify your account via SMS. 

2. Outdated App Versions:

• What it means: Google may not allow sign-ins to older versions of their iOS apps.
• How to resolve:
  • Update iOS: Make sure your iPhone is running the latest version of iOS.
  • Update Apps: Check the App Store and update the YouTube, Gmail, Google Drive, and other Google apps to the latest versions. 

3. Other Potential Issues:

• Network Connectivity: Ensure you have a stable internet connection. 
• App Data: Try clearing the app cache or resetting the app data for Google apps. 
• Try another way: If you can't sign in, try signing in through a browser instead of the app. 
• Contact Google Support: If none of the above solutions work, you can try contacting Google support for assistance. 

4. Specific to YouTube:

• Re-authentication:
• To protect your account, you might be asked to re-authenticate before using certain features on YouTube. 
• Administrator Restriction:
• If you see a message saying "Sorry, you can't access YouTube with your Google Account. Your access has been restricted by your administrator," it means your Google Workspace domain administrator has restricted access.