How to Activate Call Forwarding when Busy and Unavailable

You’re on an important call, and you see another one coming in. Do you abruptly end the first call, ignore the second and hope they leave a voicemail, or just stare at your mobile phone in a panic? We’ve all been there.

That frustrating moment of juggling phone calls, or the sinking feeling of seeing a “missed call” from a client or loved one, doesn’t have to be your reality. There’s a simple, powerful feature built right into your phone designed to solve this exact problem.

In this guide, I’m going to show you the quick and easy steps on how to activate call forwarding when you’re busy on another line or when your phone is unavailable.. By the end, you’ll have a system that ensures you never miss a critical call again.

Universal Call Forwarding Codes

Note: Some carriers, like Verizon, may use older codes such as *72 and *73. If the standard codes above result in an error, try the older codes or follow the step-by-step guides for your specific mobile phone model in the sections below.

How to Activate Call Forwarding When Busy and Unavailable?

Activating conditional call forwarding ensures you never miss an important phone call, even when you’re on another line or your phone is off. The process is different depending on whether you use an iPhone or an Android device.

For iPhone Users

iPhones include basic call forwarding, but forwarding based on specific conditions requires manual dial codes. This method works regardless of carrier limitations.

Steps to Activate Call Forwarding on iPhone:

• Open the Phone app on your iPhone.
• Use the keypad to dial the appropriate code:

• To forward when busy: Dial *67*[10-digit number]#
• To forward when unreachable: Dial *62*[10-digit number]#

• Press the call button after entering the code and the desired forwarding number.
• Look for a confirmation message on your screen stating that the forwarding was successful.

Note: If you don’t see the “Call Forwarding” option in your iPhone’s Settings > Phone menu, your carrier may require you to use these dial codes directly for setting up call management.

For Android Users

Most Android devices allow you to manage conditional forwarding directly through the mobile phone settings menu.

Steps to Activate Call Forwarding on Android:

• Open the Phone app on your Android device.
• Access the Settings menu, usually by tapping the three-dot icon in the top right corner.
• Navigate to Call Forwarding. (You might need to go to “Calling accounts” or “Supplementary Services” first, depending on your phone’s model).
• Choose the specific option you need: “Forward when busy” or “Forward when unreachable”.
• Enter the forwarding number where you want calls to be redirected.
• Tap “Turn On” or “Enable” to activate the setting.

Deactivating Conditional Call Forwarding

Turning off call forwarding is just as simple. Each platform offers its own method.

To deactivate on iPhone:

You must use the corresponding deactivation codes. Dial the code and press the call button.

• Busy: Dial ##67# and press call.
• Unreachable: Dial ##62# and press call.

To deactivate on Android:

Follow the same steps as activating it, but choose the “Turn Off” or “Disable” option instead.

Important Information to Know

• Verify with Your Carrier: Always verify these steps and dial codes with your specific mobile carrier. This confirms the instructions are correct and compatible with their network and your plan.

• Look for Confirmation: When activating call forwarding with a code, some carriers will send you a confirmation message to your screen. Others may provide a short audio tone to acknowledge that the activation was successful.

• Test Your Setup: After enabling forwarding, consider calling your phone from another device to ensure it’s working exactly as you expect.

Pro Tips: Best Practices for Managing Call Forwarding

Activating call forwarding is the first step. Using it effectively is what maintains professionalism and prevents lost opportunities. Follow these best practices to get the most out of the feature.

I. Choose Your Destination Wisely

The number you forward calls to matters. Forwarding an important business call to a personal cell phone with a casual voicemail greeting appears unprofessional. Always direct calls to a line that is appropriate for the caller, such as a dedicated office number, a professional receptionist, or a voicemail service with a business-oriented message.

II. Always Test Your Setup

Do not assume your forwarding rules are working correctly. After you activate a setting, test it immediately. Use a different phone to call your number under the specific condition (e.g., call while your line is busy, or turn your phone off and call it). This simple test confirms that calls are being routed correctly before a real client or contact tries to reach you.

III. Inform the Receiving Party

If you are forwarding calls to a colleague, assistant, or answering service, let them know. An unprepared person answering a call can lead to confusion and a poor customer experience. Give them context on the types of calls to expect so they can answer professionally and take accurate messages on your behalf.

IV. Perform Regular Audits

It is easy to set a forwarding rule and forget about it. Get into the habit of reviewing your settings every few months. Use the status check codes (*#67# for busy, *#62# for unreachable) to see what rules are active. This prevents calls from being sent to an outdated number long after you no longer need the setting.

V. Understand Potential Costs

While forwarding calls to a domestic number is typically free, forwarding calls to an international number incurs a charge. Your carrier will bill you for the forwarded call at standard international rates. Before forwarding to any number outside your country, check your carrier’s pricing policy to avoid an unexpectedly large phone bill.

Troubleshooting Common Call Forwarding Issues

Call forwarding is a powerful feature, but like any telecom function, it may not always work perfectly. When forwarding fails or behaves unexpectedly, it can affect communication and lead to missed calls. This section outlines the most common issues, their causes, and step-by-step solutions to fix them.

Let’s walk through each problem with examples and clear actions.

1. Dial Codes Not Working (Invalid or Error Message)

When you enter a call forwarding code (like *67*number#), you receive an error message, or the call doesn’t go through.

✅ Possible Causes:

• Incorrect dialing format

• Carrier doesn’t support that specific code

• Feature is not enabled on your plan

• Using outdated or region-specific codes

Solution:

• Double-check the format. It must follow this pattern: *code*[10-digit number]#

• Try legacy codes like *72 or *73, especially if you’re using carriers like Verizon or AT&T

• Contact your mobile provider to confirm if your plan supports conditional call forwarding

• Restart your phone and try again

Example: A T-Mobile user receives an “Invalid MMI Code” message when dialing *62*. After calling support, they learn that their prepaid plan does not support conditional forwarding.

2. Forwarding Set Up but Calls Aren’t Redirecting

You’ve activated forwarding successfully, but incoming calls still ring on your phone or go to voicemail.

✅ Possible Causes:

• Forwarding was not properly saved

• Conflicting features such as voicemail or DND override.

• Number entered incorrectly

• Weak signal or airplane mode

Solution:

• Recheck the entered number for errors

• Disable Do Not Disturb (DND) and voicemail, then re-test

• Use the status check code (e.g., *#67#) to verify active settings

• Turn off airplane mode or switch networks temporarily

• Test the setup using another phone to call your number

Example: After activating call forwarding to her office, Priya realizes the calls are still going to voicemail. She finds out her “DND” mode was enabled, and disabling it fixes the issue.

3. Calls Are Looping or Going Back to the Original Number

Issue: When someone calls, the call loops back between multiple numbers or fails to connect.

✅ Possible Causes:

• Two numbers are set to forward calls to each other

• Network error or misconfiguration

• Forwarding to a number with forwarding or voicemail active

Solution:

• Don’t set up two phones to forward calls to each other (e.g., A → B and B → A)

• Forward to a dedicated line, not another mobile with call forwarding active

• Use a business number or VoIP line that’s designed to handle forwarding chains

• Deactivate all forwarding using ##002# and reconfigure from scratch

Example: Raj forwards calls to his assistant, who also forwards her phone back to Raj. The call kept bouncing. Disabling both and setting only one direction fixed the loop.

4. Forwarding Works on Wi-Fi But Not on Mobile Network

Call forwarding works when the phone is on Wi-Fi calling, but fails when using mobile data or cellular networks.

✅ Possible Causes:

• Carrier restrictions on the mobile network

• Roaming or weak signal zones

• Wi-Fi calling settings override call handling

Solution:

• Switch off Wi-Fi and test on cellular only

• If you’re roaming internationally, contact your carrier to check forwarding support abroad

• Set call forwarding only through dial codes, not app-based settings, when traveling

• Check that your phone is not using dual-SIM mode, which can interfere with settings

Example: A digital nomad working from Spain found his forwarding only worked when connected to Wi-Fi. He updated his Vodafone plan to include international call routing.

5. Can’t Deactivate Call Forwarding

You’ve tried deactivating forwarding, but your calls are still being redirected.

✅ Possible Causes:

• Incorrect deactivation code

• Multiple forwarding rules are active at once

• Forwarding set from the carrier portal, not the phone itself

Solution:

• Use universal deactivation code: ##002#

• Run individual disable codes:

• Busy: ##67#

• Unreachable: ##62#

• Unanswered: ##61#

• Check your provider’s online portal or mobile app for any additional rules

• Restart your device after making changes

Example: Maria used her provider’s web dashboard to activate forwarding but tried disabling it using her iPhone settings. The issue was resolved only after logging in and turning it off directly from the carrier portal.

6. Call Forwarding Not Available on Prepaid or Basic Plans

Your phone doesn’t show call forwarding options, or the codes always fail.

✅ Possible Causes:

• Your carrier does not support call forwarding on your plan

• You’re using a locked phone that restricts carrier functions

• Feature may be limited to postpaid or enterprise accounts

Solution:

• Upgrade to a plan that includes call forwarding

• Contact your carrier to request activation of the feature

• Use apps like Google Voice or VoIP services as an alternative

Example: Tom’s prepaid SIM card wouldn’t allow call forwarding via any code. After switching to a postpaid plan, the feature activated instantly.

Final Word

Call forwarding is a simple but powerful tool for improving the likelihood that you won’t miss an important call. Call forwarding ensures your phone is reachable regardless of the reason you may be occupied or unreachable. In some cases, you’ve traveled out of range or activated an airplane or “do not disturb” mode.

Overall, understanding how to activate, manage, and troubleshoot conditional call forwarding on both iPhones and Androids will help you maintain consistent and effective communication and project professionalism. Just remember to test your setup, change your forwarding numbers, and confirm with your carrier to prevent service interruptions and unexpected charges.

These best practices will help you maintain commitment to your customers, whether you are using a personal line or a line for your business.

FAQ

How to activate call forwarding when not reachable?

To activate call forwarding when not reachable, dial ##62[phone number]#* and press the call button. This will forward calls to the specified number only when your phone is unreachable.

How do I activate call forwarding when busy?

To activate call forwarding when busy, dial ##67[phone number]#* and press the call button. Calls will be forwarded only when you’re on another call.

What is the difference between *# 61 and *# 62?

*#61# checks the number calls are forwarded to when unanswered, while *#62# shows the number calls forward to when your phone is unreachable.

What is *#21 code call forwarding?

The *#21# code lets you check the status of all your call forwarding settings at once.

How can I change how many times my phone rings before forwarding?

You can change the number of rings before forwarding by dialing 61phone number11*[seconds]#** and pressing call. The seconds can be 5, 10, 15, 20, 25, or 30 (each equals the number of rings).

Can I forward my calls to an international number?

Yes, you can forward calls to an international number, but it depends on your carrier and may incur international call charges.