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If network reception or signal strength on the Xiaomi smartphone is weak, we can activate WiFi calls to make calls over an existing WiFi network. Wi-Fi calling must be supported by the respective network provider.

Note: If the function cannot be found under the SIM card settings, we can enable it by entering the following combination *#*#869434#*#*. This must be entered via the dial pad of the phone app.

Android 11 | MIUI 12.0
Step 1: Tap on  Settings
Step 2: Tap on  SIM cards & mobile networks
Step 3: Choose a  SIM card   (Dual SIM)
Step 4: Enable or disable  Make calls using Wi-Fi
  1. Tap on Settings
  2. Tap on SIM cards & mobile networks
  3. Choose a SIM card (Dual SIM)
  4. Enable or disable Make calls using Wi-Fi
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Xiaomi Instructions