WiFi Calling Setup
I have iPhone 13 mini with two active eSIMs and spent 2 days trying to get Wi-Fi Calling to work using TP-Link guides and Gemini AI assistance (which gave tons of futile setup advice like UDP Session Timeout, U-APSD, Firewall rules, UPnP, DNS, etc.) — all with no luck.
Eventually, it turned out to be as simple as that:
- Disable NAT > ALG > SIP ALG (this is recommended but not required).
- Enable NAT > ALG > IPsec ALG (this is required but none of the TP-Link guides mention that).
That's all. Worth to know that it may take around ~15 seconds to get connected to ePDG on every WiFi reconnection, so you need to be patient and wait a moment to see „{Your Carrier} Wi-Fi” status change.
Optionally, configuring the Wi-Fi Calling Profile according to the guide How to use Wi-Fi Calling in your Omada Ecosystem gives you extra control (QoS, calls statistics and history), though it's non-obligatory (this guide definitely needs to be updated with the SIP/IPsec ALG info to be complete and useful). Be also aware that call statistics are not real-time and short calls (let's say under 1 minute) may not be captured in the history at all.
Additionally, I'm dropping here complete Polish Top Mobile Networks ePDG gateways list, where MCC = 260 for Poland and MNCs were taken from UKE MNC list (the only source of truth, see the link in Description field).
UKE is Polish national regulatory authority responsible for overseeing the telecommunications, postal services, and radio frequency spectrum markets. It is an independent government agency that functions similarly to the FCC (Federal Communications Commission) in the United States or Ofcom in the United Kingdom. So, the best idea is to get MNC codes directly from particular country regulatory authority to avoid mistakes.
Additionally, I'm dropping here complete Polish Top Mobile Networks ePDG gateways list, where MCC = 260 for Poland and MNCs were taken from UKE MNC list (the only source of truth, see the link in Description field).
UKE is Polish national regulatory authority responsible for overseeing the telecommunications, postal services, and radio frequency spectrum markets. It is an independent government agency that functions similarly to the FCC (Federal Communications Commission) in the United States or Ofcom in the United Kingdom. So, the best idea is to get MNC codes directly from particular country regulatory authority to avoid mistakes.
