O2 Wi-Fi Calling Not Showing on Xiaomi
Wi-Fi Calling lets you make calls over your Wi-Fi connection when O2 mobile signal is weak. This guide checks whether your Xiaomi and O2 plan support Wi-Fi Calling, and fixes cases where the setting is missing or grayed out.
- Compatibility check
- Step-by-step fix
- Common causes
- Frequently asked questions
Enabling O2 Wi-Fi Calling on Xiaomi
Not all O2 plans include Wi-Fi Calling. Log into the O2 app and check your plan features. Contact 202 (free from O2) to enable it if it is not included.
Wi-Fi Calling requires device support. On Xiaomi: go to Settings → SIM cards & mobile networks → Wi-Fi Calling and check if the option appears. If missing entirely, your device may not support this feature with O2.
Go to Settings → SIM cards & mobile networks → Wi-Fi Calling and switch the Wi-Fi Calling toggle on. On some Xiaomi models, this option only appears when connected to Wi-Fi.
Wi-Fi Calling settings may be hidden when not on Wi-Fi. Connect your Xiaomi to a Wi-Fi network, then navigate to Settings → SIM cards & mobile networks → Wi-Fi Calling to access the option.
On iPhone: Settings → General → About. If a carrier update prompt appears, tap Update. Carrier updates often add Wi-Fi Calling support for O2.
After enabling Wi-Fi Calling, restart your Xiaomi. Allow 2 minutes for O2 to register the feature. You should see 'Wi-Fi' or 'VoWiFi' next to the signal indicator.
If the Wi-Fi Calling toggle is greyed out and your device supports it, call 202 (free from O2). O2 may need to enable Wi-Fi Calling on your specific SIM or account.
Common Causes of This Issue on O2
| Cause | Likelihood | Fix |
|---|---|---|
| Not in plan | High | Contact carrier to enable |
| Device incompatible | Medium | Check device compatibility |
| Not connected to Wi-Fi | Low | Connect to Wi-Fi first |
Frequently Asked Questions
Does O2 support Wi-Fi Calling?
Yes, O2 supports Wi-Fi Calling. It must be enabled both at the device level and on your O2 account. If the setting does not appear in {nav_wifi_call}, your Xiaomi may not support it with O2, or it may need to be enabled on your account via 202 (free from O2).
Does Wi-Fi Calling use my data allowance?
No — Wi-Fi Calling uses your Wi-Fi connection and does not consume your O2 mobile data allowance. Calls made via Wi-Fi Calling are charged at your standard O2 plan call rates, the same as regular mobile calls.
Can I make emergency calls via O2 Wi-Fi Calling?
Wi-Fi Calling on O2 does support 999 and 112 emergency calls over Wi-Fi. However, location accuracy may be reduced compared to mobile calls. Ensure your registered address is correct in the O2 app for emergency call location purposes.
Still having trouble? Contact O2 support on 202 (free from O2) or visit our contact page for further help.