What should I do if Wi-Fi calling cannot work through TP-Link wireless router?

Updated 11-25-2021 08:37:09 AM 24480
This Article Applies to: 

Note: Make sure your Internet Service Provider provides you with Wi-Fi calling service and the Phone has Wi-Fi calling option available in settings. If you cannot find any Wi-Fi calling option on your Phone, please contact the manufacturer to verify whether your Phone supports Wi-Fi calling or not.


Step 1. Check if you are running the latest Firmware for the TP-Link router.

If you’re unsure which firmware version you are running, you can download the latest firmware from TP-Link Website. About how to upgrade the firmware, please refer to How to Upgrade the Firmware on the TP-Link Wi-Fi Routers (New Logo)?

Step 2. Disable SIP ALG.

On the wireless router, You may go to Advanced > NAT Forwarding > Uncheck "Enable SIP ALG" > click on Save.

On the deco, refer to the FAQ How to Disable SIP ALG on Deco?


Step 3. Reserve the IP Address for the Smartphone on the TP-Link router. You may refer to How to configure Address Reservation on Wi-Fi Routers (new logo)?


Step 4. Enable Port forwarding for UDP port 500 (IKE2) and port 4500 (IPsec Nat Traversal). Please refer Port forwarding: how to set up virtual server on TP-Link wireless router?

For Example: - To open port 500, please enter the details as below.

Internal Port: 500

Internal IP: IP Address reserved for the Smartphone

External Port: 500

Protocol: ALL


(Optional) Step 5. Enable Port Trigger entries for UDP port 500 (IKE2) and port 4500 (IPsec Nat Traversal).

 Refer to the screenshot below to enable Port Trigger.


Step 6. Now, try to connect the Smartphone to the TP-Link router Wi-Fi and make calls over Wi-Fi.


If you still cannot use Wi-Fi calling after following above instructions, please contact TP-Link technical support with the information below:

1. Country and ISP that provides Wi-Fi calling.

2. Screenshots of above settings which you have set on TP-Link router.

3. Phone model and OS. (Test with Android and IOS phones if possible)

4. Details of the problem. The Wi-Fi calling icon doesn’t display? Or not able to dial on Wi-Fi?

5. Hardware and firmware version of TP-Link router.



Get to know more details of each function and configuration please go to Download Center to download the manual of your product.

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