Hi there! I understand you're having trouble logging into your Sleep Number app on your iPhone. Let’s try to sort this out together.

First, can you let me know if you’re receiving any specific error messages when you attempt to log in? Additionally, have you checked if your internet connection is stable? Sometimes, connectivity issues can cause login problems.

In the meantime, here are a few steps you can try:

1. Verify Credentials: Make sure you're entering the correct email and password. If you’re unsure, you might want to try the “Forgot Password” option to reset it.

2. Check for App Updates: Ensure that you have the latest version of the Sleep Number app. You can go to the App Store, search for the app, and see if there's an update available.

3. Reinstall the App: Since you've already tried reinstalling, ensure you completely delete the app and then download it again from the App Store.

4. Bluetooth and Wi-Fi Connection: Make sure that your iPhone is connected to a stable Wi-Fi network, and try enabling Bluetooth to establish a connection with your Sleep Number bed. Here's a link for further assistance on connectivity.

5. Try Switching Networks: If possible, try using a different Wi-Fi network or enabling cellular data to see if there’s an improvement.

If these steps don’t resolve the issue, we may need to look into the app’s compatibility with your device or contact support for further assistance. Let me know how it goes! Are you satisfied with the solution I provided?