You can keep a separate business number on the phone you already own by using a virtual-number service through its mobile app. Calls, texts, and voicemail for the business line are handled separately from your personal number, without requiring another handset or, for app-based services, a second SIM.
How a second business number works on one phone
A business phone app gives you a separate number and manages its calls and messages inside the app. Depending on the provider and call settings, calls may use an internet connection, carrier minutes, or call forwarding. The business number remains distinct from your personal number, even though both are accessible on the same device.
Grasshopper says its mobile app lets users manage business calls and texts while keeping personal calls and texts separate on the same device. Quo, formerly OpenPhone, describes internet-based business calling and messaging through its apps on mobile, desktop, or tablet, without extra phone hardware. These are providers’ descriptions of their own services, not independent call-quality tests. See Grasshopper’s app information and Quo’s small-business VoIP information.
Choose the service that fits your business
Before signing up, check the service’s availability in your country and compare the exact plan you would use. A low or free starting price does not by itself tell you whether the plan supports your number type, messaging needs, team, or emergency-call requirements.
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- Number and location: Confirm that the provider can issue a number in your country and the area code or city you want. Check whether local and toll-free numbers are available; Google Voice, for example, does not offer 1-800 numbers.
- Billing and eligibility: Find out whether the price is per account or per user, whether a workspace subscription is required, and whether your account type and location qualify.
- Everyday features: Compare business texting and voicemail, greetings, scheduled hours, call routing, desktop access, and whether colleagues can share or answer the line.
- Calling method and data: Ask whether calls use the app over the internet, carrier minutes, or forwarding. Google says an internet call uses about 0.2 MB of data per minute; this is Google’s service guidance, not a universal guarantee for all VoIP apps.
- Number control: Read the provider’s terms for number ownership and portability before relying on the number for customer relationships or account recovery.
- Emergency calling: Check the exact plan’s emergency-call support and how calls are routed. Do not assume a virtual-number app handles emergencies like an ordinary carrier line.
Google Voice: distinguish the available plans
Google Voice is not one interchangeable plan. Google’s documentation separates personal use, paid standalone plans for eligible US personal Gmail accounts, and Google Workspace add-on plans. Their features, account requirements, and supported locations differ.
| Plan path | Price and billing | Key qualification |
|---|---|---|
| Personal Google Voice | Free | Standalone personal service is US-only; number availability depends on area code or city. |
| Standalone Starter | $10 per month | Google’s current plan page, checked October 3, 2026, lists this for eligible US personal Gmail accounts; one user. |
| Standalone Standard | $20 per month | Google’s current plan page, checked October 3, 2026, lists this for eligible US personal Gmail accounts; one user. |
| Workspace Starter, Standard, or Premier add-on | $10, $20, or $30 per user per month, respectively | Workspace subscription and organization requirements apply; service and number availability depend on supported countries or regions. |
Prices and plan details are from Google’s official documentation and may change. Google’s plan comparison shows that features such as call recording, 911 support, auto attendants, and team functions vary by plan and account configuration. Review Google’s standalone plan details and Google’s explanation of plan types rather than assuming a personal, standalone, and Workspace account offer the same capabilities. For setup and number availability, consult Google’s setup instructions.
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Other ways to add a line—and when they make sense
Business phone app or virtual number
This is the most direct fit when you want one device and a business number separate from your personal line. Grasshopper’s search-indexed pricing page showed a starting price of $14 per month when checked October 3, 2026; confirm current pricing and what each plan includes with Grasshopper before subscribing. Quo also offers app-based service, but its price is not stated here. Compare current plan terms rather than assuming a provider’s headline price includes every feature or add-on.
Second SIM or dual-SIM service
A second carrier line may work on a compatible phone, but support depends on both the device and carrier. Verify compatibility, plan terms, and how calls and messages behave before choosing this route. It is not required for app-based business-number services.
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Desk phone or headset
A desk phone can be useful if you also want a fixed home-office handset, but it is unnecessary for keeping a business line on your current phone. A compatible headset can make calls hands-free; it does not create a second number. Google notes that some Bluetooth device buttons may not answer or end Google Voice calls.
Set up the business line and keep boundaries clear
- Confirm availability and requirements. Check that the service and desired number type are available where you live, and verify plan eligibility, billing basis, and number portability.
- Choose the exact plan. Match its voicemail, texting, routing, and team features to how you handle customer calls. For Google Voice, confirm whether you need personal, standalone, or Workspace service.
- Install the provider’s app and obtain the number. Follow the provider’s current setup flow. Grant only the permissions needed for the calling and messaging features you plan to use.
- Configure business availability. Set a professional voicemail greeting and, if supported by the plan, business hours and call routing. Check that replies and outgoing calls use the business number when intended.
- Test ordinary use before publishing the number. Call and text the line from another phone, check voicemail and any desktop access you plan to use, and confirm what happens when the app has no internet connection.
Keep ordinary emergency calling available
Emergency-call support varies by provider, plan, and account configuration. Google documents differences in emergency support and says a computer call cannot be used to call emergency services. Check the exact service documentation for the device and plan you will use, and keep your regular device emergency-calling option available rather than assuming an app-based business line is a substitute.
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