How to Forward Calls on iPhone

What Is Call Forwarding?

Call forwarding sends every incoming call to a different phone number. When someone dials your iPhone, the call rings wherever you tell it to go.

This matters for business owners who step away from their desk, travel, or run a one-person operation. Instead of sending callers to voicemail, you can forward calls to an AI answering service, a virtual receptionist, your office line, or a colleague.

There are two types of call forwarding:

• Unconditional forwarding sends every call straight to another number. Your iPhone never rings.
• Conditional forwarding only sends calls when you do not answer, when your line is busy, or when your phone is off or out of signal.

Unconditional forwarding is best for vacations, after-hours coverage, and sending all business calls to an AI receptionist. Conditional forwarding is best when you want your phone to ring first, then send missed calls to a backup number.

How to Forward Calls on iPhone Using Settings

The fastest way to forward calls is through your iPhone Settings. This method works on GSM carriers like AT&T and T-Mobile. If you use Verizon, see the carrier code section below.

How to Set Up Conditional Call Forwarding

Conditional forwarding sends calls only when you do not answer, when your line is busy, or when your phone is unreachable. The iPhone Settings toggle only handles unconditional forwarding. For conditional rules, you use carrier dial codes.

Open your Phone app, go to the keypad, and dial the code that matches your carrier and the condition you want.

Replace [number] with the full 10-digit phone number, including area code. End every code with # and press the call button. Wait for a confirmation tone or message.

If you do not hear a confirmation, try again or contact your carrier. Codes vary by plan and region.

How to Turn Off Call Forwarding

Turning off forwarding takes five seconds. Use Settings if you enabled it there. Use a carrier code if you used a dial code.

How to turn it off in Settings:

1. Open Settings > Apps > Phone > Call Forwarding.
2. Toggle Call Forwarding off.

How to turn it off with carrier codes:

• AT&T / T-Mobile: Dial ##21# and press call to turn off unconditional forwarding. Dial ##004# to cancel all conditional forwarding.
• Verizon: Dial *73 and press call.

After you disable forwarding, test it by calling your iPhone from another phone. It should ring normally.

Forwarding Calls to an AI Answering Service

If you use an AI answering service like Dark Harbor, forwarding your iPhone is the connection between your mobile number and the AI.

Here is how it works:

1. Your business number rings your iPhone during the day.
2. When you step out, enable call forwarding to your AI answering service number.
3. Every incoming call goes straight to the AI, which answers in your business name, handles common questions, books appointments, and captures lead information.
4. You get a transcript or summary of every call via text or email.

This is especially useful for:

• Solo professionals who step away from the office
• Tradespeople and contractors on job sites
• Consultants who travel between meetings
• Small business owners who do not have a dedicated receptionist

To forward to an AI service, use unconditional forwarding in Settings or the *21* carrier code. This sends every call directly to the AI so no caller hears a ringtone on your phone first.

If you only want missed calls forwarded, use conditional forwarding with the *61* or *71 code. Your phone rings first, and unanswered calls go to the AI.

Number Format and Common Mistakes

The most common reason forwarding fails is the wrong number format. Follow these rules:

• Use a 10-digit U.S. number for domestic forwarding. Example: 5551234567
• Most U.S. carriers block international forwarding. Do not try to forward to an overseas number.
• Include the area code. Without it, the carrier cannot route the call.
• Do not add spaces, dashes, or parentheses. The carrier network reads only digits.
• If forwarding to a VoIP or AI service, use the exact number format the provider specifies.

Common mistakes to avoid:

• Entering extra digits after the number. Verizon specifically warns that extra digits can send callers to a busy signal.
• Forwarding to a number that is switched off. The caller will reach that number's voicemail, not your iPhone voicemail.
• Forgetting to include the area code.
• Setting forwarding while out of cellular range.

Dual SIM and eSIM iPhones

If your iPhone has two lines, one physical SIM and one eSIM, call forwarding is configured per line. You must choose which line to forward before entering the destination number.

In the Call Forwarding settings, tap the line you want to forward. Then enter the forwarding number and tap Back. Repeat the process for the other line if needed.

This matters for business owners who keep a personal line and a business line on the same phone. Forward only your business line so personal calls still ring your iPhone.

If you use conditional forwarding between one line and another, Apple notes that calls may not reach voicemail. Contact your carrier for the exact setup if you need this configuration.

Does Call Forwarding Work Over Wi-Fi?

Call forwarding runs on your carrier's network, not your Wi-Fi connection. You need cellular service to set it up. Once it is active, calls continue forwarding even if your iPhone is off or out of range, because the carrier handles the redirect at the network level.

Wi-Fi Calling is a separate feature. It lets you make calls over Wi-Fi when cellular coverage is weak. It does not replace call forwarding, and it does not change how forwarding works.

If you are traveling and want forwarding active before you leave, enable it while you still have a strong cellular signal.

Does Call Forwarding Cost Extra?

Most modern U.S. wireless plans include call forwarding at no extra monthly fee. However, forwarded calls may still use plan minutes or trigger long-distance charges.

• Verizon: No monthly fee on most plans. Forwarded calls are billed as if you answered them on your mobile phone. If you do not have unlimited minutes, forwarded calls count against your plan.
• AT&T: Forwarded calls are billed for the length of the call. Long-distance charges may apply if the forwarding number is outside your home calling area.
• T-Mobile: Included on most plans. International forwarding is blocked.

If you forward a high volume of business calls to an AI answering service, check with your carrier before you run up unexpected charges.

Troubleshooting: What If Call Forwarding Does Not Work?

If forwarding is not working, run through this checklist before calling your carrier.

• Confirm you have cellular service. Call forwarding will not activate if your phone has no signal.
• Restart your iPhone. A reboot refreshes carrier settings and often fixes forwarding.
• Check your number format. Try the 10-digit format first. Remove spaces, dashes, or extra characters.
• Verify the destination number is active. Forwarding to a disconnected number sends callers to a dead end.
• Make sure you selected the right line. On Dual SIM, confirm you forwarded the correct line.
• Try a carrier code instead of Settings. If the Settings toggle fails, use *21*[number]# for GSM carriers or *72 for Verizon.
• Update iOS and carrier settings. Go to Settings > General > About to check for carrier setting updates.
• Reset network settings as a last resort. This clears all Wi-Fi passwords and network configs, so only use it if nothing else works.
• Contact your carrier. If the Call Forwarding option is missing from Settings entirely, your plan or carrier may not support it.

iPhone Call Forwarding vs. Business Phone Systems

iPhone call forwarding is a quick, device-level fix. It sends your mobile calls somewhere else. It works for one number and basic rules.

A business VoIP or PBX system is a call-routing platform. It handles multiple team members, schedules, menus, analytics, and integrations.

Use iPhone forwarding when:

• You have one business line
• You need temporary coverage
• You want to send calls to an AI answering service
• You do not need complex rules

Use a business phone system when:

• You have a team with different roles
• You need after-hours schedules and ring groups
• You want call recording, analytics, or CRM integration
• You need forwarding by department or location

Many small businesses start with iPhone forwarding and upgrade to a VoIP system as they grow.

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