When you log into Coinbase for the first time from Bitkey, you’ll be prompted to authenticate by clicking a link sent to your email.
If you're having trouble with this authentication step, it may be caused by Apple's Private Relay feature on iPhone. This feature can make it appear as though you're signing in from a different device or location, which may interfere with authentication.
To resolve the issue:
- Temporarily disable Private Relay on your iPhone
- Complete the Coinbase authentication process
- Once authentication is successful, you can re-enable Private Relay
Note: Using a VPN can also interfere with the login process and may cause similar issues.