Second Phone Number for Business: 5 Options Compared

The Five Ways to Get a Second Phone Number for Business

If you are still deciding whether to split business from personal at all, the guide to separating work and personal phone numbers works through boundaries, records, privacy, and cost. This comparison picks up after that decision. You want a business second number; the question is which kind.

The options differ in where the number lives and what can travel through it. Two are cellular lines sold by a carrier. One is a number held by an internet calling service. One is a published number that passes calls along to a phone you already own. The last isn't a number you keep at all: it hides yours while you text.

Two questions narrow the field fast. First, will customers need to phone you? If they will, text masking can support your texting but can't be your only channel, because it gives customers no number to dial. Second, will anyone besides you answer the number? A line tied to the SIM in your pocket goes wherever you go, which is perfect for a solo operator and awkward for a team of three.

A third question matters later but is cheap to settle now: whose name is on the account? The account holder is the one who can move the number to another provider, so the answer decides who keeps it when a partner leaves, an employee quits, or you sell the business.

Option 1: A Second SIM or eSIM on the Phone You Already Carry

Most recent iPhones and many Android phones can run two cellular lines at once. One line can use a physical SIM card and the other an eSIM, a digital SIM profile the carrier sends to your phone, or both lines can be eSIMs. Some recent iPhone models sold in the US have no SIM tray at all, so on those the second line has to be an eSIM.

The second line doesn't have to come from your current carrier. You can buy a prepaid or postpaid plan from a different provider and run it beside your personal line, which lets you choose a modest talk-and-text plan for business without touching your personal plan. The catch: a phone locked to one carrier may refuse another carrier's SIM or eSIM until it is unlocked, so check the lock status before you buy.

Customers get an ordinary mobile number. Your calls and texts reach them the way personal ones do, in their phone's own apps, and nothing marks the number as a business line unless you say so. That familiarity is the main appeal: no app to open, no account to keep alive, and it works anywhere your phone has a signal, including places where data is too weak for internet calling.

A few everyday details decide whether a dual-SIM setup holds up for business:

• Choose defaults deliberately. Decide which line places new calls, which one starts new texts, and which one carries mobile data. A wrong default is the easiest way for a business text to go out from your personal number.
• Expect one line to wait while the other is busy. On many dual-SIM phones, while you are on a call on one line, the other line may not ring, and its callers can go straight to voicemail. Some phones and carriers offer a setting that uses Wi-Fi calling to let the second line ring, so look for it in your cellular settings.
• Treat the phone as a single point of failure. Lose it, break it, or let the battery die, and both numbers go dark together.

This option suits a solo operator who works mainly from a phone: a mobile groomer, a handyman, a personal trainer. It suits a team poorly. You can't lend a SIM line on your personal phone to an employee for the afternoon, and if the line is billed on your personal plan, the number follows you rather than the business.

Option 2: An Add-On Line From Your Carrier

The second route starts with the carrier you already pay. Ask to add a line, and it can land in one of three places: as an eSIM on your current phone, on a separate phone kept just for work, or, with some carriers, as an add-on number that rings the phone you already own without a second SIM, usually managed through the carrier's own app. Those add-on number products come and go, and their names and rules vary, so ask what your carrier offers on the day you sign up.

On the phone itself, an add-on eSIM line behaves exactly like Option 1. The difference is on paper. Both numbers sit on one account and one bill, you deal with one support team, and multi-line plans can make the extra line cheaper than a standalone plan. If you want the business line documented separately for bookkeeping, ask whether the carrier can itemize it or put it on an account of its own.

The account question matters most here. Carriers typically offer business accounts in a company's name as well as personal accounts, and whoever holds the account controls the number, including the authority to move it to another provider. Two common situations show why that matters:

• You hire someone and give them a line. If the line sits on the company's account, the number stays with the company when that person leaves, and so do the customers who have it saved. If it sits on the employee's personal account, they can take it with them.
• You bring in a partner or sell the business. A number on your personal family plan is awkward to hand over, because moving it means untangling it from your own account first.

A separate work phone is the add-on line in its strongest form. Work apps and contacts stay on a device you can switch off or leave at home, which is why it remains the norm when an employer supplies the phone. The price is a second device to carry, charge, and keep updated; the work-versus-personal guide weighs that trade in detail.

Where carrier lines fall short is sharing. A cellular number rings the phone it is attached to. If you want two people to pick up the same number, or you want calls to follow business hours, you need a service layered on top, which is where the next two options come in.

Option 3: A VoIP or Virtual Number

A VoIP number, often sold as a virtual number, is held by an internet calling service rather than tied to a SIM. You make and take calls and texts in the provider's app, on your phone, a computer, or both, over Wi-Fi or mobile data. Because the number lives in an account instead of a device, one number can often ring several people, and you can answer from a laptop at your desk.

Google Voice is a widely used example, and its documentation is a useful map of how this kind of service works. Google's Voice Help center describes the no-charge Voice plan as being for personal, consumer use, and lists paid plans for businesses separately. As of September 2026, standalone plans for US users start at $10 a month without a Workspace subscription, and Workspace add-on plans start at $10 per user per month. Depending on the plan, they add features built for teams: automated attendants that route callers, ring groups that let several people answer one number, and phone numbers that stay with the business when employees leave.

The same help center spells out limits worth knowing before you print a number on anything:

• Texting has edges. Voice can't text five- or six-digit short codes, and Google warns it may temporarily restrict you if you send many texts in a short period or recipients mark your messages as spam.
• Some services won't text you. Google notes that some websites, such as banks or subscription services, won't send text messages to Voice numbers, so keep account security on a line you control long term.
• Setup runs through a number you already have. Google texts a verification code to your existing phone when you sign up. Never read that code to anyone who asks for it; the help center has a page on protecting it and says Google employees will never ask for the code.

Other VoIP business services work in broadly similar ways, with differences in price, team features, and texting rules. The legacy comparisons go product by product: Google Voice and Hushed side by side for personal-scale second numbers, and Burner and Sideline for business use for app-based business lines.

The trade-offs of a VoIP number all flow from the account. The number works only while the app and your connection do, so a dead zone for data is a dead zone for the line, even when your phone shows bars for ordinary calls. If the account is suspended, closed, or allowed to lapse, the number goes with it. And because you sign in rather than insert a SIM, protect the account the way you would protect email: a strong, unique password and two-step sign-in.

Option 4: A Forwarding Number That Rings Your Cell

A forwarding number is a published business number that passes incoming calls to a phone you already own. It might be a virtual local number, a toll-free number, or an office landline with forwarding turned on. Callers dial the business number, your cell rings, and the business number is the only one they ever see printed.

Forwarding shines when the number has to stay put while everything behind it changes. You can paint it on a van or print it on a yard sign, then change where it rings as your setup changes: your cell for now, a new hire's phone later, an answering service during a vacation. Many services can ring several phones at once or in sequence and send calls to voicemail outside business hours. VoIP services usually include forwarding too; Google's Voice Help center has a guide to custom call forwarding, for example.

The weak spot is the way back. Forwarding handles calls coming in; what you send out is a separate question. If you return a missed call from your phone's regular dialer, the customer sees your cell number, and the privacy the forwarding number bought you is gone. The fix is to place outgoing calls through the provider's app or outbound-calling feature, so they show the business number, and to test it by calling a friend before you rely on it.

Texting is the other gap. Plenty of forwarding setups handle calls only. Texts sent to the business number may land nowhere, may appear only inside the provider's app, or may not be supported at all, and a reply typed in your phone's own messaging app goes out from your cell. If customers text as often as they call, confirm that the service can send and receive texts on the business number before you publish it.

A wireless-industry rule of thumb applies whenever a text includes a forwarding number. CTIA's Messaging Principles and Best Practices say messages shouldn't contain phone numbers that are assigned to, or forward to, unpublished numbers unless the owner of those numbers is clearly identified in the text. In practice: name your business every time you text out a number that rings through to your cell.

Local or toll-free? A local number with an area code customers recognize reads as a nearby business. Google's Voice Help center says US users can search for a Voice number by city or area code, though Voice doesn't offer 1-800 numbers. Toll-free numbers, with area codes such as 800, 888, and 877, suit businesses that serve customers nationwide and want one number for all of them. If you plan to text from a toll-free number, confirm that your provider supports texting on it before the number goes to print.

Option 5: Number Masking for Texts You Send

Masking isn't a second number you keep. It is a way to send a text without revealing any number of yours: the service delivers your message, and the recipient sees a stand-in instead of your real number. What phone number masking is explains the mechanics; for a business, the point is that there is nothing to publish, nothing to keep active, and nothing for a stranger to save.

Ghost works this way. Your text goes out with your real number masked, and the recipient sees a protected sender ID. When you want an answer, a Reply Link lets the person send one reply, delivered to your phone as a text, without seeing your number. You can keep a message history and reach recipients in more than 100 countries from the Android app or the web app in any browser, and schedule messages in the web app. How Ghost protects your privacy covers what happens to your number and messages along the way.

Masking fits the contacts a business meets before, or instead of, a lasting relationship:

• A first reply to a lead from a listing or an ad, before you know whether the job is real.
• A one-time vendor, such as a rental company confirming a delivery window.
• A marketplace buyer picking up surplus equipment.
• A final reminder to a client you won't work with again.

Its limits are just as clear. Ghost is text-only, and a customer can't save a masked sender ID and use it to reach you weeks later. Nor is it a place to receive verification codes or to sign up for accounts on other services. So for most businesses, masking works alongside one of the other four options rather than replacing them: a callable line for customers you keep, and masked texts for everyone else. Number masking vs a second number walks through where each one protects you more.

How to Get a Second Number on iPhone for Business

Every option above works with an iPhone, but each lives in a different place on the phone, and that shapes the day-to-day experience.

A second eSIM line (Options 1 and 2) lives in the built-in Phone and Messages apps. Adding the eSIM, labeling the lines, and choosing a preferred line for each contact are covered step by step in the iPhone setup section of the work-and-personal guide, so the business-specific details here are about messaging.

Apple's RCS support page describes RCS as a carrier-provided service. You need iOS 18 and a plan from a carrier that supports RCS on iPhone, and you turn it on under Settings > Apps > Messages > RCS Messaging (as of September 2026). With RCS, texts to Android phones can carry high-resolution photos and videos, read receipts, and typing indicators, and they still appear in green bubbles, as SMS does. Because RCS comes from the carrier, whether your business line gets it depends on the carrier behind that line, not on your personal plan. Apple's page also mentions RCS Business Messages, which some businesses use to send alerts and updates about orders and other transactions; those come through business messaging services, not from an ordinary second line.

If you use iMessage, check which numbers and email addresses it sends from under Settings > Apps > Messages > Send & Receive (menu names can vary by iOS version). If iMessage starts new conversations from your personal number, a customer with an iPhone can end up with it.

A VoIP number lives in its provider's app, with its own inbox and notifications, separate from Messages. Google Voice, for example, has an iPhone app; its help center covers setting a default account in it and using it with Siri. The separation helps with boundaries, since muting one app quiets the business. It also means customer messages depend on that app's notifications, so make sure they are allowed and not silenced by an evening Focus you forgot about.

A forwarding number needs nothing installed to receive calls; your iPhone simply rings. Returning calls and texts through the business number usually takes the provider's app, as described under Option 4.

Masking works through a browser. Ghost has no native iPhone version; on an iPhone it runs as a web app in Safari or any other browser, so you can send masked texts without installing anything.

Android owners have the same five choices. Dual-SIM menus vary by manufacturer, and the Android steps in that same guide list where common models keep them. Ghost also has an Android app on Google Play.

Texting Customers From a Business Second Number

Changing numbers doesn't change what kind of texting you are doing. Under CTIA's Messaging Principles and Best Practices, the wireless industry's voluntary guidelines, texts sent by a business, or by anyone acting for one, count as business ("non-consumer") messaging on any number. The guidelines expect consent before you text, express written consent before marketing texts, and an easy way to opt out.

What does change between options is how much sending each can handle before it looks like something else. CTIA describes typical personal texting: a person typically can't send or receive more than about one message per second, and "only in unusual cases" handles more than a few hundred in a day, usually to a limited number of recipients, with a rough balance of texts sent and received. A business sending the same reminder to its whole customer list from a SIM line looks nothing like that, and the guidelines say service providers may filter or block traffic that looks like unwanted messaging. There is a twist, too: business texts that happen to stay within those personal-looking limits are still business texts, because the classification follows the sender, not the volume.

Nor can extra numbers spread the load. Spreading messages across many sending numbers has a name in the industry, snowshoe messaging, and CTIA's guidelines say senders shouldn't do it. If your volume has outgrown a single line, the answer is a service built for business texting, not a drawer full of second numbers.

Texts sent from software fall under a US-specific system. Twilio's explanation of A2P 10DLC describes it as the standard US carriers put in place so that texts sent from applications to US recipients over ordinary 10-digit numbers are verified and consensual. Registration has two parts: a brand, which identifies who is sending, and a campaign, which describes what the messages are for and how people opt in, opt out, and get help. Twilio says anyone sending texts from an application over a 10-digit number to the US must register, that standard brands need a tax ID such as an EIN, and that its customers who send unregistered traffic pay additional carrier fees.

Twilio also notes that toll-free numbers and short codes sit outside the 10DLC system. CTIA describes short codes, the five- or six-digit numbers, as the platform for high-volume messages such as flight delays and bank account alerts, and says the authority to text-enable a toll-free number rests with whoever holds that number for voice service.

Here is how the five options line up for customer texting:

Whichever option you choose, a text that names the business behind the number is easier to trust and easier to act on:

Cost, Ownership and Porting: Who Keeps the Number

Prices change too often, and vary too much by country and carrier, to quote other companies' rates reliably, so this table shows what you pay for rather than how much.

The monthly price matters less than portability, because the number is the part customers remember. Here is what each option lets you take with you:

• Carrier lines (Options 1 and 2) can generally be ported to another carrier by the account holder, which is why the carrier account deserves a PIN.
• VoIP numbers can often be ported, on the provider's terms. Google's Voice Help center says a Voice number must be unlocked before you port it out, which costs $3 unless the number was originally ported in, and that porting a mobile number into Voice costs $20.
• Forwarding numbers depend entirely on the provider. Before the number goes on a van or a sign, ask whether you can port it out and what happens to it if you cancel.
• Masking leaves nothing to port. That is the upside and the downside: no number to lose, and nothing for customers to keep.

Porting in can still be a smart move. If your personal cell number is already printed on years of invoices and listings, turning it into a business number that rings on several devices can be cleaner than training every customer to use a new one. Plan the order, though: the new personal line comes first, and the port comes second.

Which Second Line for Business Fits Your Situation

Six sketches show how the answers combine. The businesses are illustrative, not real customers.

A mobile dog groomer working alone. Customers phone to book and text when they're running late, and she spends the day in a van between driveways. A second eSIM line keeps everything in the phone's built-in apps and works on cellular signal alone. When an inquiry comes from a neighborhood group post, a masked first reply holds back even the business number until the booking is real.

A bookkeeper who works from a laptop. Clients email documents and occasionally phone with questions. A VoIP number that rings on her computer and phone lets her answer at the desk and sign out on weekends. Since the number anchors a real practice, a paid business plan fits better than a free personal one.

A three-person landscaping company. Whoever is free should answer, and the number is painted on two trucks. A VoIP business plan with a ring group, or a forwarding number that rings all three phones, keeps one published number while the crew changes. The account belongs in the company's name.

A potter who sells at weekend markets and online. Buyers text about commissions and pickups, and hardly anyone phones. Masking covers most of it with no monthly bill, and a second number can wait until repeat commission clients need a way to reach her first.

A wedding photographer with seasonal inquiries. The number sits on a website and in vendor directories for years. A forwarding or VoIP number keeps that published number stable while the phone behind it changes, as long as callbacks go out through the provider's app. Masked texts handle one-off coordination with venues and caterers.

A consultant with clients in several countries. A VoIP number handles calls from a laptop in any time zone. For texts, Ghost reaches more than 100 countries and can schedule a message to land in the client's morning.

A few mistakes make a second line cost more than it should:

• Building a business on a free personal-use plan. If the plan's terms describe personal use, start on a business plan rather than moving a number customers already rely on later.
• Putting a team's shared number on one person's personal account. When that person leaves, the number can leave with them.
• Returning forwarded calls from your cell's own dialer. One callback undoes the whole point of the forwarding number.
• Sending bulk updates from a SIM line. Use a business texting service with the right registration instead.
• Crossing the line from privacy into harm. Using any second number to reach someone who has blocked you, or to pose as another person or business, can amount to harassment or fraud and can be illegal. The legal guide to private communication explains where those lines sit.

For more on how private texting fits into a growing company, see whether your business needs anonymous texting.

Frequently Asked Questions

Sources

• Google: Google Voice Help
• Apple: Turn on RCS messaging on your iPhone
• CTIA: Messaging Principles and Best Practices
• Twilio: What is A2P 10DLC?