# 0 on iPhone: Dialling 0 for the Operator URL: https://byshahid.com/blog/dialling-0-for-the-operator-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > 0: The classic operator digit, and what it actually does on mobile. On the old landline network, 0 reached a live operator who could place collect calls, person-to-person calls and third-party billed calls. That role has largely disappeared. - **Code:** 0 - **What it does:** The classic operator digit, and what it actually does on mobile. - **Published for:** Verizon, AT&T, T-Mobile and UScellular - **Type:** Support varies The classic operator digit, and what it actually does on mobile. This page explains what `0` 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 does 0 do? On the old landline network, 0 reached a live operator who could place collect calls, person-to-person calls and third-party billed calls. That role has largely disappeared. On a modern US mobile network, dialling 0 alone usually does one of three things: nothing at all, a recorded message, or a transfer into your own carrier's customer service menu. None of the four major carriers publishes 0 as a supported service, and operator-assisted calling has effectively been retired on wireless. If you need help with a call, 611 reaches your carrier. If you need an emergency service, 911 is the number. Neither should be replaced by 0. ## How do I use 0? - Open the Phone app and tap Keypad. - Type 0 exactly as written. - Press the green Call button and wait for the result. ## Which carriers does this apply to? | Published for | Verizon, AT&T, T-Mobile and UScellular | | Type | Support varies | | Good to know | Included for completeness. Operator service is a legacy landline feature and is not documented as supported by any of the four major US wireless carriers. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related more carrier and n11 codes - [511: Traffic and Travel Information](/blog/traffic-and-travel-information-iphone/) - [311: Non-Emergency City Services](/blog/non-emergency-city-services-iphone/) - [211: Community Services Line](/blog/community-services-line-iphone/) - [411: Directory Assistance](/blog/directory-assistance-iphone/) - [988: 988 Suicide and Crisis Lifeline](/blog/988-suicide-and-crisis-lifeline-iphone/) - [811: Call Before You Dig](/blog/call-before-you-dig-iphone/) See all [more carrier and n11 codes](/blog/iphone-codes/more-carrier-codes/) 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. This entry is part of Secret Codes Pro. **Secret Codes: IMEI & Carrier** is free on the App Store: https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322 ## FAQ ### What does 0 do on iPhone? The classic operator digit, and what it actually does on mobile. On the old landline network, 0 reached a live operator who could place collect calls, person-to-person calls and third-party billed calls. That role has largely disappeared. ### What else should I know about 0? On a modern US mobile network, dialling 0 alone usually does one of three things: nothing at all, a recorded message, or a transfer into your own carrier's customer service menu. None of the four major carriers publishes 0 as a supported service, and operator-assisted calling has effectively been retired on wireless. ### What are the steps for 0? 1. Open the Phone app and tap Keypad. 2. Type 0 exactly as written. 3. Press the green Call button and wait for the result. ### Where do I use 0? On the keypad of the Phone app. ### Is 0 a hidden or secret code? No. It is a published service, not a hidden menu. iPhones do not have Android-style engineering menus. ### Which carriers does 0 work on? It is published for Verizon, AT&T, T-Mobile and UScellular. Included for completeness. Operator service is a legacy landline feature and is not documented as supported by any of the four major US wireless carriers. ### Does 0 work on Android phones too? It is handled by the carrier or service rather than the iPhone, so it is not tied to one phone brand. Check with your carrier. ### Will 0 work outside the US? It is published for US carriers and services, so do not count on it abroad. Ask your carrier before you travel. ### What if 0 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 0? 511: Traffic and Travel Information. State-run road conditions, closures and transit information. ### What else is in this category? 311: Non-Emergency City Services. Local government requests and non-emergency reports. ### Can I find 0 in an app? Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details, as part of Secret Codes Pro. ## Sources - [Verizon Support](https://www.verizon.com/support/)