Secret Codes guide

**67*[number]# on iPhone: Forward When Busy

By Muhammad Shahid · 4 November 2026 · 3 min read

Quick answer

**67*[number]#: Redirect calls that arrive while you are on another call. Registers a destination for calls that arrive while your line is engaged. If call waiting is switched on, the network usually offers you the second call first and only forwards it if you decline or ignore it.

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Key facts
Code	*67[number]#
What it does	Redirect calls that arrive while you are on another call.
Published for	AT&T and T-Mobile
Type	GSM networks

Redirect calls that arrive while you are on another call. This page explains what **67*[number]# 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.

What does **67*[number]# do?

Registers a destination for calls that arrive while your line is engaged. If call waiting is switched on, the network usually offers you the second call first and only forwards it if you decline or ignore it.

How do I use **67*[number]#?

Open the Phone app and tap Keypad.
Type **67*[number]#, replacing [number] with the full phone number, including the area code.
Press the green Call button.

Which carriers does this apply to?

Published for	AT&T and T-Mobile
Type	GSM networks
Good to know	GSM networks only. Interacts with call waiting — see *43#.

Secret Codes code detail with Open in Phone button — The Secret Codes detail screen shows the steps, the carriers and an Open in Phone button.

See all call forwarding codes or every category of iPhone codes.

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Frequently asked questions

What does **67*[number]# do on iPhone?

Redirect calls that arrive while you are on another call. Registers a destination for calls that arrive while your line is engaged. If call waiting is switched on, the network usually offers you the second call first and only forwards it if you decline or ignore it.

What are the steps for **67*[number]#?

1. Open the Phone app and tap Keypad. 2. Type **67*[number]#, replacing [number] with the full phone number, including the area code. 3. Press the green Call button.

Where do I use **67*[number]#?

On the keypad of the Phone app.

How do I add the number to **67*[number]#?

Replace [number] with the full phone number, including the area code, then press Call.

Is **67*[number]# a hidden or secret code?

No. It is a standard GSM code, handled by the network rather than by a hidden menu on the iPhone.

Which carriers does **67*[number]# work on?

It is published for AT&T and T-Mobile. GSM networks only. Interacts with call waiting — see *43#.

Does **67*[number]# work on Android phones too?

GSM codes are a network standard, so they generally behave the same on any phone on a network that supports them.

Will **67*[number]# work outside the US?

It depends on the network you are on. GSM codes are a standard, but each network decides which it supports.

What if **67*[number]# 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 **67*[number]#?

*#67#: Check Busy Forwarding. See where calls go while you are already on a call.

What else is in this category?

##67#: Cancel Busy Forwarding. Remove the busy-line forwarding rule.

Can I find **67*[number]# in an app?

Yes. Secret Codes, a free iPhone app, includes it with its steps and carrier details.

Sources

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