To resolve the issue of the Msmarthome app hanging on the latest iOS version, you can follow these step-by-step troubleshooting tips:

1. Close and Reopen the App: Start by completely closing the Msmarthome app. Double-click the home button (or swipe up from the bottom of the screen on newer models) to access the app switcher. Swipe the Msmarthome app off the screen to force-close it, then reopen the app.

2. Restart Your Device: Sometimes, a simple restart can resolve app performance issues. Hold down the power button and either the volume button (depending on your iPhone model) until you see the slider to power off. Slide to turn off, wait a few moments, and then turn the device back on.

3. Check for App Updates: Ensure you have the latest version of the Msmarthome app. Open the App Store, tap on your profile picture in the top right corner, scroll down to see if there are updates available for your apps, and tap "Update" next to Msmarthome if it’s listed.

4. Reinstall the App: If the app continues to hang, consider deleting and reinstalling it. To do this, press and hold the Msmarthome app icon until a menu appears, select "Remove App" and then "Delete App." After removing it, go to the App Store, search for Msmarthome, and reinstall it.

5. Check for iOS Updates: Sometimes, issues are related to compatibility with the latest iOS version. Go to Settings > General > Software Update and check if there is an update available. If there is, proceed to download and install it.

6. Clear Background Apps: Background apps can occasionally cause conflicts. Double-click the home button (or swipe up from the bottom) to view all open apps and swipe away any that you aren’t using. This can free up system resources and improve app performance.

7. Reset Network Settings (if applicable): If Msmarthome relies on your internet connection, issues with Wi-Fi can cause it to hang. Reset your network settings by going to Settings > General > Reset > Reset Network Settings. Note that this will erase saved Wi-Fi passwords.

8. Check Apple Support: If none of these solutions work, additional help may be found in official Apple support articles that address app performance issues on iOS devices - learn more.

By following these steps, you should be able to minimize or eliminate the hanging issues you are experiencing with the Msmarthome app on your iOS device. If the problem persists, consider reaching out to Msmarthome’s customer support for further assistance.