How to set up call forwarding for a small business in 5 minutes

You don't need an IT guy for this

Call forwarding sounds technical, but setting it up on a small business line takes about five minutes. This guide covers the most common scenarios: a cell phone that doubles as your business line, a VoIP line (like Google Voice, Vonage, or RingCentral), and a traditional landline.

The goal is simple: when you can't pick up, calls automatically forward to an AI receptionist that can answer, qualify, and book, instead of going to voicemail.

Option A: You use your cell phone as your business line

This is the most common setup for small service businesses. You can forward every call, or use conditional forwarding, which only forwards calls you don't answer or can't take because you're busy.

On iPhone

1. Open Settings → Phone → Call Forwarding
2. Turn on Call Forwarding and enter the AI receptionist number in Forward To
3. This forwards every call. To forward only the calls you miss, use your carrier's conditional code below.
4. To turn it off: switch Call Forwarding off again

On Android (most carriers)

1. Open the Phone app → the three-dot menu → Settings → Calls (or Supplemental Services) → Call Forwarding
2. Select Forward when unanswered or Always forward
3. Enter the AI receptionist number and tap Enable

Carrier-specific codes

Most US carriers also support simple codes you can dial directly from any phone:

• AT&T: Dial *21* + the forwarding number + # for all calls, or *61* + the forwarding number + # for unanswered calls, then press Call
• Verizon: Dial *72 + the forwarding number for all calls, or *71 + the forwarding number for busy or unanswered calls, then press Call. Dial *73 to turn it off.
• T-Mobile: Dial **21* + the forwarding number + # for all calls, or **61* + the forwarding number + # for unanswered calls, then press Call

Option B: You use a VoIP line (Google Voice, RingCentral, Vonage, Grasshopper)

VoIP systems make call forwarding even easier since it's handled in a web dashboard:

Google Voice

1. Go to voice.google.com → Settings → Calls
2. Under "Call Forwarding," add the AI receptionist number
3. Set it to ring simultaneously or forward after a set number of rings

RingCentral, Vonage and Grasshopper

1. Log into your admin dashboard
2. Navigate to Phone Numbers or Call Routing
3. Add the AI receptionist number as a forwarding destination
4. Set the rule: forward after 3 rings (or immediately for after-hours)

Option C: You have a traditional landline

1. Pick up the receiver and listen for a dial tone
2. Dial *72 and wait for a second dial tone
3. Dial the forwarding number (the AI receptionist number)
4. Wait for two short beeps, then hang up
5. To cancel forwarding: dial *73 and hang up

Setting up conditional vs. unconditional forwarding

You have two main modes to choose from:

• Unconditional (always forward): Every call goes to the AI immediately. Best if you're on job sites all day and want the AI to handle everything.
• Conditional (forward when busy or unanswered): Your phone rings first. If you don't pick up within 3-4 rings, the call forwards to the AI. Best if you want to answer calls yourself when you're available.

Testing your setup

Once forwarding is enabled, have someone call your main number from a different phone. Confirm that:

1. The call routes to the AI correctly
2. The AI answers with your business name and greeting
3. The call shows up in your dashboard with a summary

That's it. Five minutes, no technical expertise required, and you're now answering every call, even when you're elbow-deep in a job.