This. Upgrade wrecked my radar

Hello Plhcpat,

Thank you for using Apple Support Communities. We're not quite sure we fully understand your issue. You mentioned that you're experiencing issues with your radar. Do you mean that you're experiencing issues with the Maps app? If so, we'd like to recommend some steps that might be able to help you. Click here: If Maps isn't working on your Apple device - Apple Support

1.) Turn on Location Services and Location Access for Maps. In the Settings app, tap Privacy, then tap Location Services. Make sure Location Services is on, and make sure Maps is set to While Using the App or Widgets.

2.) Set the date, time, and time zone correctly on your device. In the Settings app, tap General, then tap Date & Time. If possible, turn on Set Automatically.

3.) Turn on cellular data or Wi-Fi so that you have an active connection. In the Settings app, tap Wi-Fi or Cellular, then select a network or cellular plan.

Also, try restarting your iPhone. This is a simple step that usually helps refresh things: Restart your iPhone - Apple Support

How to restart your iPhone X, 11, 12, 13, or later

1.) Press and hold either volume button and the side button until the power-off slider appears.

2.) Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3.) To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.

If your issue is something completely different, please share more in-depth details. If you're using a specific app, let us know which app you're using. This will give us a better idea on what exactly is occurring. Thank you for using Apple Support Communities. Cheers.