You can set up a virtual phone system without installing a traditional landline or managing an office PBX. Choose a business number, add your team, decide where calls should go, and sign in on the devices you already use.
The basic setup can be quick, but it’s worth planning your call routing and testing it before customers start calling. If you’re keeping an existing number, you can set up the system while that number transfers from your current provider.
Here’s how to set up a virtual phone system with Nextiva, along with guidance for iPhone and Android, free options, and common setup problems.
What Is a Virtual Phone System?
A virtual phone system handles incoming and outgoing business calls through an internet-based service. Your team can make and receive calls using an app on a computer or smartphone. Some systems also support compatible desk phones.
Because employees use a business number through the service, they don’t need to give customers their personal numbers. You can also control what happens when someone calls. For example, you can send calls to a person or team, play a phone menu, route calls differently after hours, or direct unanswered calls to voicemail.
Tom from Nextiva explains virtual phone systems in greater depth below:
What You Need Before You Start
A little preparation will make the five setup steps easier. Before opening your provider’s admin portal, gather:
- A good internet connection: Check the connection wherever employees will take calls. If they work from home or use mobile devices, their connections matter too.
- A list of users: Note who needs an account, an extension, or access to calls made to a shared business number.
- Your number preferences: Decide whether you want a new local or toll-free number or need to keep your current number.
- Your call-handling plan: Write down your business hours, which team should answer each type of call, and what should happen when no one is available.
- Your devices: Decide who will use a desktop app, mobile app, compatible desk phone, or a combination.
If you’re switching providers, keep your current phone bill or account details handy for the number transfer. Leave your existing service active until the transfer is complete.
Now, let’s walk through setting up a virtual phone system.
How to Set Up Virtual Phone System Software
The setup starts with choosing a plan and number. From there, you’ll add your team, decide where calls should go, and test the system before using it with customers.
1) Choose a business phone plan
Start with the calls your business handles today. A solo business may need one number, voicemail, and a mobile app. A team may also need extensions, shared call handling, business-hours routing, and an auto attendant.
We pack a ton of features into all of our business phone plans. Compare Core, Engage, and Scale based on the calling and routing features your business needs.
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Next, choose how customers will reach you:
- Get a local number if you want an area code associated with a city or region you serve.
- Get a toll-free number if you want one number for callers across different regions. Check the toll-free minutes included in your plan.
- Port your current number if customers already know it, and you want to keep it when you switch providers.
Nextiva offers virtual phone numbers, including local and toll-free options. Number availability depends on the area code and number you choose. If you plan to port an existing number, you can start configuring your new phone system while the transfer is underway.
![How Much Does a Business Phone System Cost? [2026 SMB Guide]](https://www.nextiva.com/cdn-cgi/image/width=2048,height=1152,fit=cover,gravity=auto,format=auto/blog/wp-content/uploads/sites/10/2023/10/cost-of-voip-phone-system.jpg)
2) Assign phone extensions
You’re now ready to assign extensions to your team members. Create an account for each person who needs to use the phone system. Then assign their phone numbers, extensions, and appropriate access.
An extension is an internal number that colleagues can dial, or callers can select from a phone menu. It is different from the public phone number customers use to reach your business. For example, customers might call one main number and choose extension 102 for sales.
In the Nextiva Voice Portal, add users and set up their voice service. As you assign extensions, decide whether each person needs a direct number or will mainly answer calls routed from the main business number. You can also review settings such as voicemail, call forwarding, and caller ID.
Here’s a video to take you step by step.
Once users are set up, you can decide how incoming calls will reach them. Employees can answer on a computer, a compatible desk phone, or the NextivaONE mobile app.
3) Record your phone greeting and set up call routing
Now decide what callers should hear and where their calls should go when someone calls your business number. A simple call flow might ring your front desk during business hours and send calls to voicemail after hours. A larger team might use an auto attendant to offer options such as “Press 1 for sales” and “Press 2 for support.”
Write a short greeting before you record it. Give callers your business name, clear options, and a way to reach a person or leave a message. Then set up:
- Business hours: Define when your team is available, including holiday hours.
- Call destinations: Choose which user or team answers each type of call.
- Unanswered calls: Decide when a call should move to another person or voicemail.
- After-hours handling: Record a separate message if callers need different information when you’re closed.
In Nextiva, the Call Flows area lets you connect a number or extension to business-hours rules, a phone menu, users or teams, and voicemail. Make sure each route leads somewhere useful, then activate the flow and test every menu choice.
If your account uses the Voice Portal’s separate auto attendant settings, hover over Advanced Routing and select Auto Attendants. From there, you can manage the auto attendant and its greetings.
Setting up a call flow is easy with Nextiva. Here’s a video to help you with the steps.
4) Begin placing and answering calls
Once your team is set up, you can start making and receiving calls on your business line. Ask each employee to sign in to the calling app on the devices they’ll use. If anyone uses a desk phone, connect and provision a compatible device according to your provider’s instructions.
Before relying on the system for everyday calls, test it from a number outside your business. Go beyond checking whether the phone rings:
- Call the main number and try every phone menu option.
- Test the call route during business hours and after hours.
- Let a call go unanswered to confirm that voicemail works.
- Make an outgoing call and check which number the recipient sees.
- Test transfers, extensions, and any call forwarding rules your team uses.
- Listen for delays, dropped audio, or one-way audio.
Repeat these checks on each type of device your team will use. A call may sound clear in the office but behave differently on an employee’s home Wi-Fi or mobile connection.
Once everything works as expected, your team can make calls from a computer using the business phone app or from an iOS or Android smartphone using the NextivaONE mobile app. When you need to step away, you can forward calls to another number, including your personal cell phone.
Related: How to Make & Receive Phone Calls From Your Computer (6 Methods)
5) Train your team and complete the switch
Once you’ve tested your virtual phone system, show employees how to answer, transfer, and return calls, check voicemail, and change their availability or call forwarding settings. Give the people who manage the system a copy of the call flow so they know where each call should go.
If you’re porting a number, complete your testing before the transfer date. After the transfer, call your business number from an outside line to confirm it reaches the right greeting or person. Then update any places where you used a temporary number during setup.
During the first few days, ask your team whether calls are reaching the wrong place, customers are having trouble with the menu, or anyone is missing calls. Use their feedback to adjust the routing.
If your team needs help with a feature, Nextiva’s Support Center has setup guides and training resources. Nextiva also offers live webinars on getting started, setting up call flows, and using analytics tools.
How to Choose or Port a Business Phone Number
Your number choice affects both your launch and your customers, so make it early in the setup process.
A local phone number can make sense when you’re starting a business or entering a new market. A toll-free number can give customers in different regions one number to call. If you already have a number on your website, invoices, or storefront, porting it lets customers continue using that number after you switch.
To transfer a number to Nextiva, gather your current account number, billing details, and any transfer PIN your provider requires. You may also need to authorize the transfer. Submit the information exactly as it appears on your current account because a mismatch can delay the request.
Nextiva says number transfers typically take 5-10 business days. A rejected request or an account discrepancy can extend the process to 2-4 weeks. Keep your old phone service active until the port is complete. Set up your users and call routing in advance, then test the number as soon as it moves.
How to Set Up a Virtual Phone System on iPhone
Once an admin has created your user account and assigned your calling permissions, you can use your iPhone as a business phone:
- Download your provider’s mobile app. For Nextiva, use the NextivaONE app.
- Open the app, accept its terms, and sign in with your assigned account.
- Review requests for microphone, notification, and other device permissions. Some permissions are optional, but declining them may limit app features.
- Check that the app shows the correct business number or calling account.
- Make a test call, then have someone call your business number while the app is open and again while it is in the background.
Keep notifications enabled if you need to know when business calls arrive. If a call does not ring, check the app’s notification settings, your iPhone’s Focus settings, and your internet connection before changing the company’s call flow. Check the mobile setup guide for current requirements.
How to Set Up a Virtual Phone System on Android
The Android setup follows the same basic path, though permission and battery settings vary by phone:
- Download your provider’s mobile app. Nextiva users can get NextivaONE for Android.
- Sign in with the account your admin created.
- Review permissions for the microphone, notifications, and any other features you plan to use.
- Check your assigned business number and place an outgoing test call.
- Ask someone outside your company to call you, including when the app is in the background.
If incoming calls work only when the app is open, check whether your Android phone is restricting background activity or notifications for the app. Also test on both Wi-Fi and mobile data so you know how calls behave when you leave the office.
Can You Set Up a Virtual Phone System for Free?
You may be able to get a free virtual number for personal use, but a free number is not necessarily a free business phone system. A business may need multiple users, an auto attendant, shared call handling, support, and control over what happens when someone leaves the team. Check those requirements before choosing a free service.
Google’s no-charge Basic Google Voice option is intended for personal use. Google offers separate paid Voice plans for organizations. Features and availability also vary by plan and location.
| Option | What it can cover | What to check before using it for business |
|---|---|---|
| Free personal virtual number | A separate number with basic calling and voicemail | Whether it supports business use, team access, routing, support, and number transfers |
| Provider trial | A way to test an app and call quality before subscribing | Trial length, number availability, feature limits, and what happens when the trial ends |
| Paid business phone system | Managed users, business numbers, routing, and support, depending on the plan | Per-user cost, included features, usage limits, and porting requirements |
If you only need to try calling from a second number, a free option may answer that question. If several employees need to answer one business line, map your call flow first and compare business plans against it.
Can You Set Up Your Own VoIP Phone System?
Yes. You can configure a hosted VoIP system yourself by choosing a provider, adding users, assigning numbers, and building your call flow in an admin portal. That is the approach covered in this guide; the provider runs the underlying phone service.
You can also build and maintain your own VoIP server or PBX, but that is a different project. You would take responsibility for its setup, security, connectivity, updates, and ongoing troubleshooting. For most small teams that simply need a business number and a reliable way to answer calls, a hosted system is the more direct place to start.
Troubleshooting a New Virtual Phone System
Most setup problems become easier to solve once you test one part of the call path at a time.
| Problem | What to check first |
|---|---|
| Calls sound choppy or cut out | Test the internet connection on the affected device, switch between Wi-Fi and mobile data if available, and try another headset or device. |
| Incoming calls do not ring | Check the number’s assigned call flow, business hours, user availability, app notifications, and the destination chosen for unanswered calls. |
| Calls reach the wrong person | Follow the call flow from the main number through each menu choice and verify the assigned user or team. |
| Forwarded calls go to voicemail too soon | Check both the forwarding destination and the voicemail or no-answer settings on the destination phone. |
| A ported number is not working as expected | Confirm the transfer status with the new provider. Once the port is complete, test the number from a phone outside your system. |
Change one setting at a time and repeat the same test call. This makes it easier to tell which adjustment fixed the problem.
Choosing the Best Business Phone Service
Business phone system providers come in all sizes and prices. You don’t want to be stuck with a communications platform that doesn’t match your needs, offer the right functionality, or burn holes in your wallet.
Traditional phone systems, while still in use, don’t offer the same calling functionality as Voice over Internet Protocol (VoIP) providers.
Reliable business phone service is just the beginning. From advanced video conferencing, voicemail transcription, IVR, and call recording to text messaging, Nextiva has you covered with one powerful virtual phone service with 99.999% uptime.
As your company grows, simply add local numbers, toll-free, or fax numbers. Give your team members dependable VoIP desk phones or ask them to download the Nextiva App on their mobile phones for better functionality.
If you’re ever stuck or want a second opinion, you can always reach our live customer support. Our friendly support team can handle virtually any question about your business phone system, from troubleshooting and training to more complex issues.
Small business owners, in particular, benefit from a VoIP service provider like Nextiva, which is there to support them in every business situation.
Frequently Asked Questions About Virtual Phone System Setup
You can often create an account, select a new number, add users, and test basic calling in one setup session. A larger team or a more detailed call flow will take longer to configure and check. Porting an existing number happens on a separate timeline, so begin that request early.
No. You can use a supported desktop or mobile app to make and receive calls. A compatible desk phone is an option if employees prefer a physical phone at a reception desk or workstation.
Usually, yes, if the number is eligible to transfer to your new provider. Check eligibility, gather your current account details, and keep the old service active until the port is complete.
Yes. With a provider’s mobile app and an assigned business number, you can take business calls on a compatible smartphone. Check how the app handles outgoing caller ID, notifications, and calls when you are unavailable.
Some services offer no-charge numbers for personal use, including Basic Google Voice. Check whether the service supports your intended use and the business features you need. Google’s organizational Voice plans are paid.
Yes. A hosted provider lets you configure your own users, numbers, and call routing without running the underlying phone infrastructure. Building and operating your own VoIP server is also possible, but it requires more technical work and maintenance.
