How to Configure Call Forwarding for a Virtual Number (2026)

Call forwarding for a virtual number routes incoming calls from a cloud-based phone number to your mobile, landline, or VoIP device. Configuration typically takes minutes through your provider's web console: select your number, enter a destination with the international dialing code, choose between unconditional or conditional forwarding, and test. Watch out for voicemail interception, two-leg billing, and caller ID surprises. This guide walks through every step, term, and pitfall you need to know.

Businesses miss a staggering number of calls. Research from Ambs Call Center found that companies only answered 37.8% of inbound calls, with another 37.8% landing in voicemail and 24.3% going completely unanswered. Call forwarding on a virtual number exists to close that gap, routing calls to wherever you actually are instead of letting them die on a line nobody picks up.

The virtual phone number market reflects this urgency. It reached USD 5.2 billion in 2024 and is projected to grow at 14.3% annually through 2033. Nearly 45% of small to medium-sized businesses already use VoIP technology because of its low setup costs and flexibility.

Whether you're separating personal and business communications or managing customer calls across time zones, understanding how to configure call forwarding for a virtual number is a practical skill that pays for itself quickly.

Get a virtual WhatsApp number to start receiving business calls without a second SIM or phone.

What Is Call Forwarding for a Virtual Number?

Call forwarding is the automatic redirection of incoming calls to another phone number. When someone dials your virtual number, the call gets routed to whatever destination you've specified, your personal mobile, an office landline, a colleague's phone, or even a VoIP softphone.

A virtual number makes this simpler than traditional carrier-based forwarding. With a conventional phone line, you typically dial star codes (like *72 in the US) to activate forwarding, and you're limited to what your carrier supports. With a virtual number, everything is managed through a web console or app. You log in, type a destination number, pick your forwarding rules, and you're done. No star codes, no calling your carrier's support line, no waiting.

This matters especially for small business owners who use tools like WhatsApp Business. A virtual number can verify your WhatsApp Business account while simultaneously forwarding voice calls to your existing phone. If you're weighing the benefits of a second number for WhatsApp Business, call forwarding is one of the biggest practical advantages.

The real-world use case is straightforward. One Reddit user explained their situation perfectly: “I currently have a 9-5 but also started a poop scooping business. I am busy during the day and am often unable to field phone calls for my side business.” This is the exact problem call forwarding on a virtual number solves. Calls to your business line follow you to your personal phone, and you can set rules for what happens when you can't answer.

Key Terms You Need to Know

Before configuring call forwarding for a virtual number, it helps to understand the terminology you'll encounter in your provider's dashboard. Here's every term that matters, explained in plain language.

Virtual Number

A virtual number is a phone number that lives in the cloud. It isn't tied to a specific SIM card, device, or physical location. You can receive calls and texts on it through an app, a softphone, or by forwarding to another number. It works over VoIP (Voice over Internet Protocol) or sometimes through traditional telecom networks.

Virtual numbers come in different flavors: mobile, landline, and toll-free. Some providers offer numbers in specific countries, so you can have a UK number while sitting in Singapore. If you're unsure whether a virtual number or an eSIM is the right fit, this comparison of eSIMs vs virtual numbers breaks down the key differences.

Unconditional Call Forwarding (UCF)

Unconditional call forwarding redirects all incoming calls to your destination number, every time, regardless of whether your phone is on, off, busy, or out of coverage. It's the “set it and forget it” option. Every call that hits your virtual number immediately routes to your chosen phone.

Use this when you always want calls going to one place, like a receptionist's desk or your personal mobile during business hours.

Conditional Call Forwarding

Conditional call forwarding only activates under specific circumstances. It's more nuanced than unconditional forwarding and comes in three sub-types:

• Call Forwarding on Busy (CFB): Calls redirect only when your line is already occupied with another call.
• Call Forwarding on No Answer (CFNA): Calls redirect after a set number of rings (typically 15 to 30 seconds) if nobody picks up.
• Call Forwarding on Unreachable (CFU): Calls redirect when your device is switched off, in airplane mode, or out of network coverage.

Conditional forwarding is the better choice for most people. It lets you answer calls on your primary device when available, with a safety net for the times you can't.

Destination Number

The phone number where forwarded calls land. This can be any reachable number: a mobile, landline, VoIP endpoint, or SIP address. When entering it in your provider's console, always include the full international dialing code (e.g., +44 for UK, +1 for US).

Call Whisper

Call whisper is a short audio prompt that plays privately to you (the person answering) before you're connected to the caller. It tells you which virtual number the call came from, so you know whether to answer with “Hello, this is Smith Plumbing” or “Hi, this is Sarah.”

This feature is particularly valuable for solopreneurs managing multiple virtual lines. Best practice from providers like Global Call Forwarding: keep whisper prompts to 2 to 3 seconds so they don't delay call connection.

gosimless includes call whisper free for all call forwarding-enabled connections. When a forwarded call comes in, a voice message tells you which gosimless number the call originated from.

Text-to-Speech (TTS) Welcome Greeting

A pre-recorded or auto-generated greeting that plays to callers before their call connects or forwards. Think of it as a lightweight IVR (see below). Instead of silence or generic ringing, your callers hear something like “Thank you for calling Smith Plumbing. Please hold while we connect you.”

gosimless offers a free text-to-speech welcome announcement, giving small businesses a professional greeting without extra hardware. If you also use WhatsApp Business, you might want to set up greeting messages there too for a consistent experience.

IVR (Interactive Voice Response)

IVR is the automated phone menu system that lets callers press keys or speak commands to route themselves. “Press 1 for sales, press 2 for support.” Most small businesses don't need a full IVR, but a simple TTS greeting paired with call forwarding achieves a similar professional impression.

SMS-to-Email

The automatic forwarding of inbound text messages to an email inbox. This is a companion feature to call forwarding for businesses that receive both calls and texts (including OTPs and 2FA verification codes) on their virtual number. gosimless includes unlimited SMS-to-email on all virtual number connections.

Caller ID Override / Passthrough

When someone calls your virtual number and the call forwards to your mobile, the caller ID they see is your virtual number, not your personal number. This is caller ID passthrough, and it protects your privacy.

The gotcha: if you call a customer back directly from your personal mobile instead of through your virtual number's system, your personal number shows up on their caller ID. Always return calls through your provider's app or system to maintain the separation.

Ring Time / Ring Duration

The number of seconds your phone rings before the system takes action (forwarding to another number, sending to voicemail, or disconnecting). Most providers default to 20 to 25 seconds. You can usually adjust this in your dashboard. Setting it too short means you won't have time to grab your phone; too long and callers hang up thinking nobody's there.

Call Termination / Forwarding Rates

Call termination is the cost of routing a forwarded call from your virtual number provider to the destination phone network. This is where billing surprises happen, and it deserves its own section below.

How to Configure Call Forwarding for a Virtual Number

Most providers follow a similar setup flow. Here's the generic process that applies across platforms, followed by the key decisions you'll need to make.

The Standard Configuration Process

Step 1: Log in to your provider's web console or app. This is where all call management happens. No star codes, no carrier calls.

Step 2: Select the virtual number you want to configure. If you manage multiple numbers under one account, pick the right one. Providers like gosimless let you manage several numbers from a single control panel.

Step 3: Navigate to forwarding settings. Look for labels like “Call Forwarding,” “Routing,” “Destination Setup,” or “Voice Settings.” The exact wording varies by provider.

Step 4: Enter the destination number with the full international dialing code. Don't skip the country code. Entering “07700 900000” without the +44 prefix (for a UK number) is a common reason forwarding fails silently.

Step 5: Choose your forwarding type. Unconditional (all calls, always) or conditional (only on busy, no answer, or unreachable). For most users, conditional forwarding is the smarter default.

Step 6: Configure optional enhancements. Enable call whisper so you know which line is ringing. Set a TTS welcome greeting for callers. Review caller ID settings.

Step 7: Save and test. This step is not optional. Call your virtual number from a different phone and confirm the call forwards correctly.

If you're also running two WhatsApp accounts on one phone, call forwarding ensures you can receive voice calls for your business number without any extra devices.

Key Decisions During Setup

Unconditional vs. conditional: If your virtual number is purely a business line you never answer directly through an app, unconditional makes sense. If you sometimes answer through a softphone or VoIP app but want a fallback for when you're unavailable, conditional is better.

Single destination vs. simultaneous ring: Some providers let you ring multiple phones at once (your mobile and your office phone, for example). Others only support sequential ringing, where the call tries one number first and then moves to the next. Check what your provider supports before assuming.

Ring duration: Set it long enough to actually pick up. 25 seconds is a reasonable default. If you're forwarding conditionally on no answer, test whether the ring time gives you enough window before the call redirects.

Understanding Call Forwarding Costs

Call forwarding billing is the number one area where users get caught off guard. The call to your virtual number might be free or included in your plan, but forwarding that call onward to a real phone number costs money because it generates a second call leg on a different network.

The Three Pricing Models

Pay-per-minute is the most common starting point. You pay only for forwarded minutes actually used. This works well for low-volume use or businesses just getting started.

Included-minute bundles come with monthly subscriptions. You pay a flat fee and get a set number of forwarding minutes. Overages are billed per minute. Most businesses on steady call volumes end up here.

Unlimited forwarding is a flat monthly add-on that covers all forwarding minutes regardless of volume. This gives cost predictability.

Two-Leg Billing Explained

This concept trips people up. When a call forwards from your virtual number to your mobile, two things happen on the billing side:

1. The inbound leg: your provider receives the incoming call.
2. The outbound (termination) leg: your provider places a new call to your destination number.

Both legs can carry charges. A VoIP.ms example illustrates this: a US virtual number receiving a call at $0.01/minute, forwarded to a US cell phone at $0.01/minute, costs $0.02/minute total. That's twice what you might expect if you only looked at one rate.

gosimless Pricing

gosimless charges from £0.05 per minute for call forwarding, with rates varying by destination country across coverage in over 150 countries. Call forwarding prices are available to browse through our website. An optional unlimited call forwarding add-on is available at £6.99 per month for those who want predictable costs but is only available in limited forwarding destinations.

One way to keep costs down: use WhatsApp voice calls (which run over data) for routine conversations, and reserve PSTN call forwarding for business-critical inbound calls where the caller dials your number directly.

Explore gosimless virtual numbers to see forwarding rates for your destination country.

Reducing Forwarding Costs

If you can route calls to a VoIP or SIP address instead of a traditional phone number, you may eliminate termination costs entirely. Not all providers support SIP forwarding, so check before signing up. Also consider that UK business eSIM plans with unlimited UK minutes can serve as an affordable forwarding destination if most of your calls come from UK numbers.

Best Practices and Common Mistakes

Getting call forwarding working is only half the job. Keeping it working well requires attention to a few details that practitioners frequently flag.

Always Test After Setup

It sounds obvious, but not testing is one of the most cited mistakes. Call your virtual number from a different phone. Check that the call actually forwards, that the audio quality is acceptable, that your welcome greeting plays correctly, and that call whisper announces the right line. Do this every time you change a setting.

Disable or Extend Personal Voicemail

This is the most common problem people overlook. When a call forwards to your mobile, your phone's native voicemail system doesn't know it came from a business line. If you don't answer in time, your personal voicemail picks up, and many default greetings read your personal number aloud to the caller.

AT&T explicitly warns that “call forwarding overrides your wireless voicemail.” The fix: either disable voicemail on your personal phone, extend the ring time so your virtual number's voicemail catches the call first, or record a neutral personal voicemail greeting that doesn't mention your personal number.

Use Call Whisper

If you have even two virtual numbers forwarding to the same phone, call whisper is essential. Without it, you're answering every call blind, unsure whether it's a customer for Business A, Business B, or your mother. A 2 to 3 second whisper prompt solves this completely.

Choose Conditional Over Unconditional (Usually)

Unconditional forwarding is tempting because it's simple, but it has a downside: you can never answer calls through your provider's app or softphone, because every call gets immediately rerouted. If your provider offers an app-based answering option, use conditional forwarding so the app gets first priority and the forwarded destination serves as the fallback.

Review Forwarding Logs Regularly

Most providers offer call logs or analytics. Check them. Look for patterns: calls that forwarded but went unanswered, unusual call volumes at certain hours, or destinations that consistently fail. These logs help you adjust ring times, add secondary forwarding numbers, or identify when you need to upgrade to an unlimited plan.

Consider Recording as a Companion Feature

If your business needs call records for compliance or training, look into recording calls on your WhatsApp Business line as an additional layer alongside forwarding.

Forwarding Calls Internationally

One of the biggest advantages of virtual numbers is international reach. You can have a UK number that forwards to a phone in the US, or a US number that forwards to a phone in Germany. The caller pays local rates (or nothing, if they have inclusive minutes to your virtual number's country), and only you pay the international termination cost.

When configuring international call forwarding for a virtual number, a few things matter:

Time zones. If your UK number forwards to a phone in California, calls arriving at 9am London time hit your phone at 1am Pacific. Conditional forwarding with a no-answer rule and a professional voicemail greeting handles this gracefully.

Rates vary significantly by destination. Forwarding to a US mobile is typically cheaper than forwarding to, say, a mobile in South Africa or India. Always check your provider's rate card before setting an international destination.

Latency. International forwarded calls can carry slightly higher audio latency than domestic ones. It's usually not noticeable, but worth testing.

With 75.5% of consumers reporting they've switched businesses because of poor service, making sure international callers actually reach a human (rather than an unmonitored voicemail box) has direct revenue impact.

Call Forwarding for WhatsApp Business Users

A growing use case for virtual number call forwarding involves WhatsApp Business. You verify WhatsApp Business with a virtual number, then configure call forwarding so that voice calls to that number still reach you on your personal phone.

This setup gives you:

• A dedicated business number visible to customers on WhatsApp
• Voice call reception without a second device
• Separation between personal and business communications

If you're running this setup, you can add another number to WhatsApp without disrupting your personal account. The virtual number handles verification and incoming calls, while your personal SIM stays private.

Start Forwarding Calls Today

Configuring call forwarding for a virtual number takes less time than reading this article. The setup itself is straightforward. The value lies in getting the details right: picking conditional over unconditional when appropriate, understanding two-leg billing, testing your configuration, and preventing your personal voicemail from sabotaging the experience.

Browse gosimless virtual numbers to find a UK mobile or landline number with call forwarding, call whisper, and SMS-to-email included. If you have provider-specific questions, the gosimless FAQ page covers the most common setup scenarios.

Frequently asked questions