• Ensure you have enabled Wi-Fi calling by going to Settings > Phone > Wi-Fi Calling > check the toggle for Wi-Fi Calling.
  • Try restarting the phone and modem and turning on and off Airplane mode.
  • If it doesn’t help, change the DNS or reset network settings.

Fix 1: Eject SIM and Disable Mobile Data

If Wi-Fi calling is giving you trouble, remove the SIM card from your iPhone for about 30 seconds. Clean it with a microfiber cloth. Then, insert it back. Post this, disable mobile data and try using Wi-Fi calling. This should probably fix the issue.

Fix 2: Change DNS

Often, Wi-Fi calling doesn’t work properly due to a DNS server issue. So, change the DNS server for your Wi-Fi network as follows.

Step 1 : Open Settings > go to Wi-Fi > tap on the i icon next to your Wi-Fi network.

Step 2 : Tap on Configure DNS . If it’s showing Automatic, tap on Manual .

Step 3 : Now, enter 8.8.8.8 or 8.8.4.4 (Google’s servers). However, if it is on Manual, select Automatic .

Select i icon - 1

Fix 3: Reset Network Settings

Lastly, if nothing works, try resetting network settings. To do this, go to Settings > General > Reset > Reset Network Settings .

Tap Reset - 2

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