To turn on, wait until the call is over

Turning on Wi-Fi calling during a call will cause issues. Wait until your call has finished to turn it on.

Change your Wi-Fi calling preferences

If your phone is set to prefer Wi-Fi calling, it might use Wi-Fi even when the cellular signal is better. To change your Wi-Fi calling settings, click the link below for instructions:

• Android
• iPhone: This setting is not available

Run the latest software updates

If you're having trouble with Wi-Fi calling, make sure your device has the latest software update. Older versions can cause problems.

Reading SIM error

1. Take out the SIM card from the phone.
2. Wait for one minute.
3. Put the SIM card back in.

Apple Provisioning Server errors

If you are trying to turn on Wi-Fi calling or iMessage on your iOS device and get an activation error, it might be because of your device's name, like "Bob's iPhone." We suggest you try to change the name of your iOS device and then try activating the feature again.