My iPhone 11 keeps saying demo call and hangs up

It sounds like your iPhone 11 might be in "demo" or "retail" mode. This mode is typically used on display devices in stores and has certain limitations, such as restricting call durations.

To resolve this issue, you need to exit demo mode. Here are the steps you can take:

1. Erase All Content and Settings

Erasing your device will remove all settings, apps, and data, including the demo mode configuration. Make sure you have a backup of your important data before proceeding.

1. Backup Your iPhone:

- Use iCloud or iTunes to back up your device.

2. Erase All Content and Settings:

- Go to Settings > General > Transfer or Reset iPhone > Erase All Content and Settings.

- Confirm and proceed with the erasure. Your iPhone will restart and display the setup screen once complete.

3. Set Up Your iPhone:

- Follow the on-screen instructions to set up your iPhone as new or restore from a backup.

2. Check for Profiles

Sometimes demo units have profiles installed that enforce demo mode settings. You can remove such profiles if they exist.

1. Check for Profiles:

- Go to Settings > General > VPN & Device Management.

- If there’s a profile listed that you don’t recognize or that indicates it’s for demo or retail use, tap on it and then tap Remove Profile.

3. Restore via iTunes or Finder

Restoring your iPhone using iTunes (on a PC) or Finder (on a Mac) can also remove demo mode.

1. Connect to Computer:

- Connect your iPhone to your computer using a USB cable.

2. Open iTunes/Finder:

- Open iTunes (on Windows or older macOS) or Finder (on macOS Catalina and later).

3. Select Your iPhone:

- Click on your iPhone when it appears in iTunes or Finder.

4. Restore iPhone:

- Click **Restore iPhone** and follow the on-screen instructions to restore your device. This will erase everything on your iPhone and install the latest iOS version.

5. Set Up iPhone:

- After restoring, set up your iPhone as new or restore from a backup.

4. Contact Apple Support

If none of the above steps work, it might be best to contact Apple Support or visit an Apple Store. They can help ensure your iPhone is correctly configured and no longer in demo mode.

By following these steps, you should be able to remove the demo mode from your iPhone 11 and eliminate the 5-minute call limit.