A. 1. Update the app: Ensure that you are using the latest version of the Movistar app. Go to your device's app store, search for Movistar, and check for updates. 2. Clear app cache: Go to your device's settings, find the Movistar app, and clear its cache. This can help improve performance and resolve minor bugs. 3. Reinstall the app: If the app continues to perform poorly, uninstall it and then reinstall it from the app store. This can help fix any corrupted files. 4. Provide feedback: While you cannot contact developers, you can leave feedback within the app or on the app store to highlight specific issues you encounter, which may help improve future versions.