# Wi-Fi Calling on iPhone: How It Works URL: https://byshahid.com/blog/wi-fi-calling-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > Place and receive calls over Wi-Fi when signal is poor. Wi-Fi Calling routes voice calls over your internet connection instead of the cellular network. All four major US carriers support it and it is the single most effective fix for a home or office with weak indoor coverage. - **What it does:** Place and receive calls over Wi-Fi when signal is poor. - **Published for:** any iPhone, Verizon, AT&T, T-Mobile and UScellular - **Type:** iOS setting Place and receive calls over Wi-Fi when signal is poor. This page explains what it does, how to use it on an iPhone and which carriers it applies to. I build **Secret Codes: IMEI & Carrier**, a free iPhone app with 317 checked codes and guides, including this one. If you would rather tap than memorise, [get Secret Codes on the App Store](https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322). ## What is Wi-Fi Calling? Wi-Fi Calling routes voice calls over your internet connection instead of the cellular network. All four major US carriers support it and it is the single most effective fix for a home or office with weak indoor coverage. Enabling it requires a registered emergency address, because the network cannot locate you from a Wi-Fi call the way it can from a cell site. **Important:** Keep your registered emergency address current. Emergency services use it to locate you when you call over Wi-Fi. ## How do I do it? - Open the Settings app. - Tap Apps, then Phone (or tap Phone directly on earlier versions of iOS). - Tap Wi-Fi Calling. - Turn Wi-Fi Calling on This iPhone on. - Enter or confirm your emergency address when prompted. ## Which carriers does this apply to? | Published for | any iPhone, Verizon, AT&T, T-Mobile and UScellular | | Type | iOS setting | | Good to know | Supported by Verizon, AT&T, T-Mobile and UScellular. Must be enabled per line on dual-SIM iPhones. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related network and signal - [Switch Between 5G and LTE](/blog/switch-between-5g-and-lte-iphone/) - [Check For A Carrier Settings Update](/blog/check-for-a-carrier-settings-update-iphone/) - [Choose Your Network Manually](/blog/choose-your-network-manually-iphone/) - [Reset Network Settings](/blog/reset-network-settings-iphone/) - [*#33#: Check Call Barring](/blog/check-call-barring-star-hash-33-iphone/) - [Review Cellular Data Usage](/blog/review-cellular-data-usage-iphone/) See all [network and signal](/blog/iphone-codes/network/) or [every category of iPhone codes](/blog/iphone-codes/). ## How Secret Codes helps Secret Codes keeps this and every other entry a search away. Pick your carrier once and each entry says whether it is published for your line. You can save favourites, add a private note, and record whether a code worked on your line. **Secret Codes: IMEI & Carrier** is free on the App Store: https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322 ## FAQ ### What is Wi-Fi Calling on iPhone? Place and receive calls over Wi-Fi when signal is poor. Wi-Fi Calling routes voice calls over your internet connection instead of the cellular network. All four major US carriers support it and it is the single most effective fix for a home or office with weak indoor coverage. ### What else should I know about Wi-Fi Calling? Enabling it requires a registered emergency address, because the network cannot locate you from a Wi-Fi call the way it can from a cell site. ### What are the steps for Wi-Fi Calling? 1. Open the Settings app. 2. Tap Apps, then Phone (or tap Phone directly on earlier versions of iOS). 3. Tap Wi-Fi Calling. 4. Turn Wi-Fi Calling on This iPhone on. 5. Enter or confirm your emergency address when prompted. ### Where do I find Wi-Fi Calling? In the Settings app on your iPhone. ### Is there a dial code for Wi-Fi Calling? No. On iPhone this is not a dial code, so you use the steps on this page instead. ### Which carriers does Wi-Fi Calling work on? It is published for any iPhone, Verizon, AT&T, T-Mobile and UScellular. Supported by Verizon, AT&T, T-Mobile and UScellular. Must be enabled per line on dual-SIM iPhones. ### Is there anything to watch out for with Wi-Fi Calling? Keep your registered emergency address current. Emergency services use it to locate you when you call over Wi-Fi. ### Does Wi-Fi Calling work on Android phones too? These steps are for iPhone. Android phones have their own menus. ### Will Wi-Fi Calling work outside the US? The iPhone steps stay the same, although some features depend on your carrier and region. ### What if Wi-Fi Calling does not work on my iPhone? Check that it applies to your carrier first, because carriers decide which services they offer and can change them. If it should apply to your line, contact your carrier. ### What is related to Wi-Fi Calling? Switch Between 5G and LTE. Control which cellular generation your iPhone uses. ### What else is in this category? Check For A Carrier Settings Update. Pull the latest network profile from your carrier. ## Sources - [3GPP TS 22.030: Man-Machine Interface of the phone](https://www.3gpp.org/dynareport/22030.htm) - [Apple Support: iPhone User Guide](https://support.apple.com/guide/iphone/welcome/ios)