To resolve the issue of the Hilton App not loading rates or allowing you to check in from your iPhone, follow these detailed steps:

1. Check for App Updates

- Open the App Store on your iPhone.
- Tap on your profile icon in the top right corner.
- Scroll to see pending updates and find the Hilton Honors app.
- If an update is available, tap Update next to the app.

2. Restart the App

- Double-click the Home button (or swipe up from the bottom of the screen on newer models) to view your open apps.
- Swipe up on the Hilton app to close it.
- Reopen the app to see if the issues persist.

3. Log Out and Log Back In

- Open the Hilton app and navigate to the account section.
- Log out of your account.
- Close the app completely as described in the previous step.
- Relaunch the app and log back into your account.

4. Clear App Cache (if applicable)

- Some apps accumulate cache that can cause issues. Reinstalling the app can help.
- Delete the Hilton Honors app from your iPhone by holding down the app icon until options appear and tapping on Remove App.
- Go to the App Store, search for the Hilton Honors app, and install it again.

5. Check Internet Connection

- Ensure you are connected to a stable Wi-Fi network or have a strong cellular signal.
- Try switching between Wi-Fi and cellular data to see if that resolves the issue.

6. Disable Background App Refresh

- Go to Settings > General > Background App Refresh.
- Find the Hilton app and turn off Background App Refresh if it's enabled.

7. Update iOS

- Go to Settings > General > Software Update.
- Install any available updates for iOS, as this may improve app compatibility.

8. Contact Customer Support

- If none of the above steps work, it may be a temporary issue with the app or your account.
- Reach out to Hilton customer support for assistance or check their status page for known outages learn more.

9. Check Online Forums for Similar Issues

- Visit forums like Reddit or FlyerTalk where users often share their experiences and possible fixes. This could reveal similar problems faced by others and their solutions learn more - learn more - learn more.

Taking these steps should help resolve your issues with the Hilton App on your iPhone. If problems persist, it might be due to a larger service issue on Hilton's end.