Hi there! I see you're getting a "bad connection" message when trying to sign up with your Apple account on the ZBD app using your iPhone. Let's figure this out together.

First, can you tell me your iPhone model and iOS version? Also, are you connected to Wi-Fi or cellular data when this happens?

In the meantime, let's try a few basic steps to eliminate common connectivity issues:

1. Check Internet Connection: Ensure your iPhone's internet connection is stable. Try opening a website or another app that requires the internet.

2. Switch Network: If you're on Wi-Fi, try switching to cellular data or vice versa to see if one works better.

3. Restart the App: Force close the ZBD app and open it again.

4. Restart Your iPhone: Sometimes a simple reboot clears temporary glitches.

Have you tried any of these already?

If the issue persists, it may be related to how the ZBD app interacts with Apple's sign-in services or a temporary server issue. I noticed a discussion where users faced similar sign-up problems described as "bad connection" on iOS apps related to ZBD1.

If you're confident your network is fine, try logging in at a different time or from a different network. I can guide you through deeper troubleshooting if needed. Just let me know!