Hi! I understand your U-verse app on your iPhone with iOS 18.7 shuts off after about 5 minutes. Let's see what might be causing this and how to fix it for you.

To start, may I ask:
- Does the app just close by itself, or does it freeze or show any error messages before shutting off?
- Have you already tried restarting your phone or the app?
- Are you on Wi-Fi or cellular data when this happens?
- Is the app fully updated to the latest version from the App Store?

Meanwhile, here are some simple steps to try:

1. Close and reopen the app: Double-tap the Home or swipe up to bring up app switcher, then swipe the U-verse app off the screen. Relaunch it.

2. Restart your iPhone: Hold the side button and volume up (or down) button until you see the power off slider. Power off, wait 30 seconds, and power on.

3. Check for app updates: Open App Store, tap your profile icon at the top right, then scroll to see if U-verse app update is available. If yes, update.

4. Check network connection: Restart your Wi-Fi router (unplug power for 1 minute, then plug back in). Ensure your iPhone is connected properly to Wi-Fi or try switching to cellular data briefly to see if issue persists.

5. Reinstall the app: Press and hold the U-verse app icon on your Home Screen, tap Remove App, then delete it. After that, download it fresh from the App Store.

If you've tried these or the problem continues, there might be an issue with the app version itself or network settings. We could also check if your iPhone’s background app refresh settings or power management options are interrupting the app.

Would you like me to walk you through any of these steps in detail, or is there any additional info you can provide about the issue?