How to Enable Call Forwarding on iPhone: A Complete Guide

Call forwarding is one of those features that sits quietly in your iPhone settings until the moment you actually need it — and then it becomes essential. Whether you're switching to a new number temporarily, managing calls across multiple devices, or simply need calls routed somewhere else while you're unavailable, understanding how iPhone call forwarding works helps you use it confidently and correctly.

What Is Call Forwarding on iPhone?

Call forwarding redirects incoming calls from your iPhone to another phone number automatically. When enabled, a caller dials your number and — without any action on your part — the call routes to whichever number you've designated. Your iPhone doesn't even need to ring first.

This is a carrier-level feature, not a purely software one. That distinction matters more than most people realize.

How to Turn On Call Forwarding on iPhone

The built-in path is straightforward:

1. Open the Settings app
2. Tap Phone
3. Tap Call Forwarding
4. Toggle Call Forwarding to the on position
5. Tap Forward To
6. Enter the number you want calls forwarded to
7. Tap Call Forwarding in the top-left corner to confirm and save

Once active, a small phone icon with an arrow appears in your iPhone's status bar, indicating forwarding is live. To turn it off, return to the same menu and toggle it off.

What You Need for This to Work

The Call Forwarding option only appears in Settings if your carrier supports it. On most GSM carriers (AT&T, T-Mobile, and most international networks), this setting is available natively. Some CDMA carriers or MVNOs handle forwarding differently — sometimes through a dialer code rather than the Settings menu.

If you don't see Call Forwarding under Phone settings, your carrier controls that feature at the network level, and you'll need to contact them or use a carrier forwarding code.

Using Carrier Codes to Forward Calls

Most carriers support MMI (Man-Machine Interface) codes — short sequences you dial directly from the Phone app's keypad. These work even when the Settings menu option isn't visible.

📞 Dial the code, enter the destination number, then press the call button. You'll typically hear a confirmation tone or message.

These codes are carrier-specific, so what works on one network may not apply to another. When in doubt, check your carrier's support page.

Conditional vs. Unconditional Forwarding

There's an important distinction between types of forwarding that affects how you use it:

• Unconditional forwarding — every incoming call routes to the forwarded number immediately, no matter what
• Conditional forwarding — calls only forward when specific conditions are met (phone is busy, unanswered after a set number of rings, or unreachable/off)

The iPhone's built-in Settings toggle controls unconditional forwarding. Conditional forwarding typically requires carrier codes or direct account settings through your carrier's app or website.

If you want calls to go to voicemail when you're busy but forward to a colleague when you're unreachable, you're dealing with conditional forwarding — and that setup lives outside the standard iPhone Settings path.

Variables That Affect How This Works for You 📱

Several factors shape what your experience with call forwarding actually looks like:

Carrier and plan type — Postpaid plans generally offer full forwarding control. Prepaid and MVNO plans vary significantly. Some plans charge per-minute fees for forwarded calls, since forwarding technically establishes two call legs.

eSIM vs. physical SIM — iPhones running dual SIM (one physical, one eSIM) can have two active numbers. Call forwarding settings in the Phone menu apply per line, so you'll need to configure forwarding separately for each if needed.

iOS version — The menu path has remained consistent across recent iOS versions, but interface labels and the exact location of the toggle have shifted slightly between major releases. If you're running an older iOS, the setting may appear under a slightly different submenu.

Wi-Fi Calling — If your carrier supports Wi-Fi Calling and you have it enabled, call routing behavior can interact with forwarding in ways that vary by carrier. Some configurations affect which calls get forwarded and which don't.

International use — Forwarding calls internationally introduces cost and routing complexity. Forwarding to an international number while roaming can result in significant charges depending on your plan.

When the Standard Method Doesn't Work

If the toggle is grayed out, missing, or doesn't hold your settings:

• Your carrier may need to enable the feature on your account — a quick call or chat with support resolves this in most cases
• A carrier settings update may be pending (Settings → General → About triggers a check)
• Resetting network settings (Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings) can clear configuration issues, though it also removes saved Wi-Fi passwords

The combination of your carrier's specific network architecture, your plan tier, your SIM configuration, and how you intend to use forwarding all shape which method works — and how seamlessly it works once it's on.