Voxify

How to Set Up Call Forwarding (AT&T & GSM Networks)

This guide explains how to forward calls on AT&T and other GSM networks, and how to ensure features like voicemail don’t interfere with call forwarding.

What you’ll need

A phone on AT&T or GSM-based network (e.g., T-Mobile, Mint Mobile)

Forwarding number: Your Assistant Phone Number
Access to the Phone app (dial pad)
Optionally: access to carrier settings or mobile app (if available)

A phone on AT&T or GSM-based network (e.g., T-Mobile, Mint Mobile)

Forwarding number: Your Assistant Phone Number
Access to the Phone app (dial pad)
Optionally: access to carrier settings or mobile app (if available)

Option 1: Set Up Call Forwarding via Dial Code

You can enable and disable call forwarding directly from your phone’s dialer.

Type

Forward All Calls

Forward When Unanswered

Forward When Busy

Cancel All Forwarding

Dial Code

**21* + number + #

**61* + number + #

**67* + number + #

##002#

Example

**21*4632704483#

**61*4632704483#

**67*4632704483#

##002#

Steps:

Open your Phone app.
Enter the appropriate code from the table above.
Tap Call.
Wait for confirmation (usually a message or tone).
Repeat for other forwarding conditions as needed.

Note: GSM networks offer conditional call forwarding, meaning you can forward calls only when busy, unreachable, or unanswered—unlike CDMA (older Verizon) networks.

Check Voicemail Settings (Optional)

Some voicemail features may interfere with forwarding (especially if using visual voicemail or call screening apps). For best results:

Disable third-party voicemail apps
Ensure your carrier voicemail is not overriding the forwarding rules
On iPhone: Settings → Phone → Call Forwarding (if visible) → Make sure correct number is entered

Final Step: Test Your Setup

Make a test call from another number to ensure forwarding behaves as expected (based on condition: busy, no answer, etc.).