Human Add AI help center covers call forwarding setup for every major US carrier (Verizon, AT and T, T-Mobile, Spectrum, Comcast, RingCentral, Google Voice, OpenPhone, and twelve more), PWA install instructions for the mobile dashboard, knowledge base editing, and account management. Most setup guides take under five minutes to complete.
Google Voice uses "linked numbers" to forward incoming calls. You can add any phone number as a destination, and Google Voice will ring it when someone calls your Google Voice number.
The quick version
Go to voice.google.com, click Settings (gear icon), open Calls, and add the destination number under "Linked numbers" or "Forwarding numbers." Calls to your Google Voice number ring the destination.
Step-by-step: set up call forwarding in Google Voice
1
Sign in to Google Voice at voice.google.com with the Google account that owns your Google Voice number. If you have multiple Google accounts, confirm you're signed in to the right one (top-right avatar).
2
Click the gear icon in the top right to open Settings.
3
Select "Calls" in the left sidebar. This is where all your forwarding settings live.
4
Under "Linked numbers," click "New linked number." Enter the 10-digit number you want calls forwarded to. Google will text or call that number with a verification code to confirm you own it - enter the code.
5
Configure call routing. Back in the Calls settings, make sure "Incoming calls" is set to forward to the linked number. You can also untick "Ring this phone" for the Google Voice web/app if you want calls to go only to the forwarded number.
6
Test. Call your Google Voice number from a different phone. It should ring at the linked destination within a few seconds.
Alternative: Google Voice for Workspace (business Google Voice)
If you have Google Voice as part of a Google Workspace subscription, the admin controls some forwarding rules at admin.google.com → Apps → Google Workspace → Google Voice. Individual users still manage their own forwarding from voice.google.com.
Things worth knowing
Free Google Voice only supports forwarding to US and Canadian numbers - no international. Paid Google Voice for Workspace supports more destinations.
"Do Not Disturb" in Google Voice sends calls straight to voicemail and bypasses forwarding. If forwarding suddenly stops working, check that DND isn't on.
You can set different schedules ("Work hours" vs "Personal hours") under Settings → Schedule, so calls only forward to your AI during specific hours.
Google Voice is free-but-quirky for business use. If you're relying on it, consider whether a dedicated business line (from any carrier) plus a Human Add AI receptionist would be more reliable.
Forwarding to an AI receptionist?
The whole reason you're reading this is probably to stop missing calls. If you're setting up call forwarding to send calls to a voice assistant, an answering service, or an AI, the steps above are the same - you just enter their number as the forward-to destination. Human Add AI gives you a dedicated AI receptionist that answers 24/7, captures every caller's intent, and texts you the details. Try it free for 7 days →
Troubleshooting
Calls still ring the old way. Most VoIP systems take 30 - 60 seconds to apply forwarding changes. Wait and test again. If it still doesn't work, sign out and back in, or restart the desk phone.
You saved the rule but don't see it. Google Voice usually applies rules to one specific number or extension. Make sure you're editing the right one - business accounts often have multiple numbers on the same login.
Callers hear "number not in service." Double-check the destination number you entered. Google Voice often requires the full 10-digit US format, sometimes with a +1 prefix.
You want some calls to stop forwarding. Most Google Voice plans support conditional rules (forward only after X rings, forward only from Y caller ID, etc.). Look for "Advanced" or "Rules" in the forwarding settings.
Every Human Add AI trial gives you a dedicated local phone number with a fully custom AI receptionist on the other end. Free for 7 days, $10 refundable activation.
Starter is $497 a month for up to 200 calls, with one AI assistant and one business number. Professional is $997 a month for unlimited calls and up to 3 AI assistants, and connects to your CRM (the software you track customers in). Enterprise starts at $1,997 a month. Every plan answers 24/7, books appointments and texts you each lead. Start with a 7-day free trial ($10 activation fee, credited to your first bill), backed by a 30-day money-back guarantee. See full pricing or call the demo line at (617) 812-5251.
How the platform fits into the daily operations rhythm
Once Human Add AI is live, the daily operations rhythm for a service-business owner changes in a small number of concrete ways. The phone stops being something the owner thinks about during business hours. Voicemail goes away because every call gets answered live. The booking calendar fills with new appointments without anybody manually keying them in. SMS alerts arrive on the on-call dispatcher's phone for every qualified lead, with the caller name, number, and intake summary already attached.
The weekly summary email arrives every Monday morning with the call count, the booking count, the SMS lead count, and the recovered-revenue math. Most operators stop opening the daily call list after the first month because the system has earned trust at that point and the weekly summary is enough. The dashboard remains available for the rare investigation: an operator drilling into a specific booking, a customer calling back about a previous conversation, or a tuning request to refine the agent script.
The change in the operator own time is the second-order effect that most operators report as the biggest unexpected value. Sixty to ninety minutes per day of phone qualification time gets returned to the operator, which can be spent on revenue-generating work, on team management, or on actually taking a lunch break. The dollar value of that time alone usually exceeds the platform monthly price for any owner-operator profile.
The honest evaluation timeline
The honest evaluation timeline for an operator deciding whether to install Human Add AI looks something like this. Day zero: call the demo line at (617) 812-5251 from any phone and run a real scenario. The demo takes about ninety seconds and gives a faithful preview of conversation quality. If the conversation quality passes the bar, proceed. If it does not, the operator has saved themselves the rest of the evaluation. Day one: fill out the ten-minute onboarding form. This creates a custom test agent for the specific business, which is free to use during evaluation.
Day two: the Human Add AI team builds the test agent and ships back recorded test calls. The operator listens to the samples, requests any adjustments, and decides whether to proceed. Day three: the operator forwards a test line (a Google Voice number, a secondary business line, or a fresh Twilio number) to the agent and runs a week of real test calls. Day ten: review the test-week data in the dashboard, compare recovered-revenue against the plan price, and decide whether to forward the real business line.
For operators who already know they have a missed-call problem, the evaluation usually collapses into a much shorter window: call the demo, fill the onboarding form, hear the recorded samples, forward the business line. Most operators who go this path are live and recovering missed-call revenue inside 72 hours of first hearing the demo.
