Please tell us some basic information before asking for help: Model Name: Firmware Version: Rooted or not: Frequency of Occurrence: APP Name & APP Version (If your issue relates to the app): In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc. ======================================== My same problem with my ROG Phone 3 I live in Hong Kong and can use wifi calling with Android 11, but can not use any more after upgrading to Android 12.
Turn on Wi-Fi calling Open the Phone app. Tap More. Settings. Tap Calls. Tap Wi-Fi calling. If you don't see this option, it's because your carrier doesn't support this feature. You can use Wi-Fi calling without service on some carriers.