If you're encountering an issue with the Exxon Mobil Rewards+ app stating that "the pump I select is not available" regardless of which pump you choose, follow these steps to resolve the problem:

1. Check Your Location and Pump Availability
Ensure that you are at a participating Exxon or Mobil station and that the pump you are trying to authorize is indeed operational. Sometimes, certain pumps may be out of service.

2. Update the App
Ensure that you have the latest version of the Exxon Mobil Rewards+ app installed. If an update is available, download it from the App Store. Improved functionality and bug fixes can resolve existing issues.

3. Restart the App
Close the app completely and then reopen it. This action can help refresh the connection to the server and the app's operational state.

4. Clear Cache/Data
If you are using the app on a device, consider clearing the cache or data (if you're on Android). On iOS, you may need to uninstall and reinstall the app to reset it entirely.

5. Reinstall the App
Uninstall the Exxon Mobil Rewards+ app from your device, then reinstall it from the App Store. This can resolve issues related to corrupted files or settings within the app.

6. Contact Customer Support
If the issue persists, contact Exxon Mobil's customer service. You can reach them at 1-888-REWARD+ (888-739-2730). They can provide specific assistance regarding the availability of pumps at your selected location - learn more.

7. Check for Configuration Issues
Sometimes configuration issues can affect how your device interacts with the pumps. If others are experiencing similar issues at your location, it's possible that the station itself is dealing with technical problems. Stay updated by asking station staff - learn more.

By following these steps, you should be able to resolve the issue with pump selection in the Exxon Mobil Rewards+ app. If problems still occur, continuing to engage with customer service will be essential for further investigation.