# Call Forwarding In Settings on iPhone: How It Works URL: https://byshahid.com/blog/call-forwarding-in-settings-iphone/ App: Secret Codes: IMEI & Carrier (https://apps.apple.com/us/app/secret-codes-imei-carrier/id6807154322) Author: Muhammad Shahid Updated: 2026-11-04 > iOS has a built-in switch for forwarding on GSM networks. When your carrier supports it, iOS exposes call forwarding as a normal switch — no codes needed. The toggle writes the same GSM setting that **21*number# does, so the two stay in sync. If the Call Forwarding row is missing, your carrier does not expose the feature to iOS. - **What it does:** iOS has a built-in switch for forwarding on GSM networks. - **Published for:** any iPhone, AT&T and T-Mobile - **Type:** iOS setting iOS has a built-in switch for forwarding on GSM networks. 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 Call Forwarding In Settings? When your carrier supports it, iOS exposes call forwarding as a normal switch — no codes needed. The toggle writes the same GSM setting that [**21*number#](/blog/turn-on-call-forwarding-star-star-21-star-number-iphone/) does, so the two stay in sync. If the Call Forwarding row is missing, your carrier does not expose the feature to iOS. Verizon and UScellular customers should use *72 / [*73](/blog/turn-off-call-forwarding-verizon-uscellular-star-73-iphone/). ## How do I do it? - Open the Settings app. - Tap Phone. - Tap Call Forwarding. - Turn the switch on and enter the destination number. - Return to Settings — a forwarding icon appears in the status bar while it is active. ## Which carriers does this apply to? | Published for | any iPhone, AT&T and T-Mobile | | Type | iOS setting | | Good to know | The row only appears on carriers that expose forwarding to iOS — in the US that generally means AT&T and T-Mobile. | _Screenshot: The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button._ ## Related call forwarding codes - [*71[number]: Forward Only When Busy Or Unanswered (Verizon)](/blog/forward-only-when-busy-or-unanswered-verizon-star-71-number-iphone/) - [*73: Turn Off Call Forwarding (Verizon / UScellular)](/blog/turn-off-call-forwarding-verizon-uscellular-star-73-iphone/) - [*72[number]: Turn On Call Forwarding (Verizon / UScellular)](/blog/turn-on-call-forwarding-verizon-uscellular-star-72-number-iphone/) - [**004*[number]#: Set All Conditional Forwarding](/blog/set-all-conditional-forwarding-star-star-004-star-number-iphone/) - [*#004#: Check Conditional Forwarding](/blog/check-conditional-forwarding-star-hash-004-iphone/) - [##004#: Erase Conditional Forwarding Only](/blog/erase-conditional-forwarding-only-hash-hash-004-iphone/) See all [call forwarding codes](/blog/iphone-codes/call-forwarding/) 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 Call Forwarding In Settings on iPhone? iOS has a built-in switch for forwarding on GSM networks. When your carrier supports it, iOS exposes call forwarding as a normal switch — no codes needed. The toggle writes the same GSM setting that **21*number# does, so the two stay in sync. ### What else should I know about Call Forwarding In Settings? If the Call Forwarding row is missing, your carrier does not expose the feature to iOS. Verizon and UScellular customers should use *72 / *73. ### What are the steps for Call Forwarding In Settings? 1. Open the Settings app. 2. Tap Phone. 3. Tap Call Forwarding. 4. Turn the switch on and enter the destination number. 5. Return to Settings — a forwarding icon appears in the status bar while it is active. ### Where do I find Call Forwarding In Settings? In the Settings app on your iPhone. ### Is there a dial code for Call Forwarding In Settings? No. On iPhone this is not a dial code, so you use the steps on this page instead. ### Which carriers does Call Forwarding In Settings work on? It is published for any iPhone, AT&T and T-Mobile. The row only appears on carriers that expose forwarding to iOS — in the US that generally means AT&T and T-Mobile. ### Does Call Forwarding In Settings work on Android phones too? These steps are for iPhone. Android phones have their own menus. ### Will Call Forwarding In Settings work outside the US? The iPhone steps stay the same, although some features depend on your carrier and region. ### What if Call Forwarding In Settings 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 Call Forwarding In Settings? *71[number]: Forward Only When Busy Or Unanswered (Verizon). Ring your iPhone first, then hand the call on. ### What else is in this category? *73: Turn Off Call Forwarding (Verizon / UScellular). Cancel forwarding set with *72 or *71. ### Can I find Call Forwarding In Settings in an app? Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details. ## Sources - [3GPP TS 22.030: Man-Machine Interface of the phone](https://www.3gpp.org/dynareport/22030.htm) - [Verizon Support](https://www.verizon.com/support/)