For Oppo devices running Android 13, the "proper" official stock dialer is ODialer. This app was specifically released by ColorOS (Oppo's software team) to allow users to switch back from the default Google Dialer to the classic Oppo/OnePlus call interface. Where to Get It
To ensure your phone uses the Oppo dialer instead of Google’s: ODialer for Android - Download the APK from Uptodown Oppo Phone Dialer Apk Android 13
Always be cautious when downloading APKs from third-party websites. Whenever possible, use the official ODialer app by "ColorOS" if it is available in your region's app store, as this ensures the app is signed by the manufacturer and won't compromise your device security. Add a step-by-step guide for the ODialer specifically. For Oppo devices running Android 13, the "proper"
Regional Restrictions: Its availability on the Google Play Store is often restricted by region. If your device was shipped with Google Dialer as the mandatory default, ODialer may not be compatible or available in your local Play Store. Download and Installation True Phone Dialer – Highly customizable, T9, call
You need the correct version compatible with ColorOS 13 / Android 13.