Buying a second phone number means obtaining an additional line of communication that works alongside your primary number without requiring a second device. This second number can be a virtual VoIP number that operates over the internet, or a traditional SIM-based number that uses cellular networks, giving you flexibility in how you manage calls and texts.
What buying a second phone number actually means
A second phone number is an extra number you can use for making calls, sending messages, and accessing services, separate from your main line. The two main types are virtual VoIP numbers, which route calls and texts through the internet using Voice over Internet Protocol technology, and traditional SIM numbers, which rely on a physical or embedded SIM card connected to a cellular network. Virtual numbers can be accessed from any device with an internet connection, while SIM numbers depend on network coverage and typically require a dual-SIM phone or a separate device.
Why you need a second phone number
Privacy and security
Using a second number for online sign-ups, purchases, and interactions shields your primary number from spam, phishing attempts, and data breaches. It acts as a buffer that keeps your personal contact details private and reduces the risk of identity theft.
Separating personal and professional life
A dedicated work number lets you compartmentalize communications, making it easier to disconnect after hours and present a professional image to clients and colleagues. This separation improves work-life balance and reduces stress.
Online selling and dating
When selling items on marketplaces or using dating apps, a second number provides anonymity. If a transaction or relationship goes poorly, you can simply stop using that number without exposing your primary contact.
International travel and avoiding roaming charges
A virtual second number can give you a local number in the country you are visiting, or offer affordable international rates. This saves money on roaming fees and makes it easier for local contacts to reach you without incurring international charges.
How to choose a second phone number service
Consider your purpose, privacy features, cost, ease of use, reliability, device compatibility, and customer support. Virtual providers like Google Voice, Burner, and Grasshopper offer flexibility and integration with apps, while traditional mobile operators like Verizon provide reliable network coverage and emergency call support. Verizon offers a "Second Number" plan for $15 per month, or $10 per month as a myPlan perk, with unlimited talk and text using your primary line's data on a compatible dual SIM device. Porting a mobile number into Google Voice costs a one-time fee of $20 and allows you to keep your original Google Voice number for 90 days, after which you must choose to make it permanent.
How to set up a second phone number on iPhone
- Ensure your iPhone model supports dual SIM. Compatible models include iPhone XR and later, which support one physical SIM and one eSIM. iPhone SE (3rd generation), iPhone 13, and later models support two eSIMs.
- To set up dual SIM on an iPhone, go to Settings > Cellular, ensure at least two lines are listed, then tap a line and select "Turn On this Line". You can then label your plans (e.g., "Personal," "Work") and choose default lines for cellular data and voice calls.
- Go to Settings > Cellular.
- Ensure at least two lines are listed. If not, add a new plan by scanning a QR code or entering details from your carrier.
- Tap a line and select "Turn On this Line."
- Label your plans (e.g., "Personal," "Work") to easily identify them.
- Choose default lines for cellular data and voice calls. You can also set which line to use for iMessage and FaceTime.
How to set up a second phone number on Android
- Ensure your Android phone supports dual SIM. Compatible models include Google Pixel 3a and later, which support one physical SIM and one eSIM. Pixel 7, Pixel 7 Pro, and later can use two eSIM profiles if supported by your carrier.
- For Android phones, activate a second SIM by going to Settings > Connections > SIM card manager, tapping the SIM, sliding the switch to On, and naming it. You can then set preferred SIMs for calls, messages, and mobile data, or choose "Ask always" for calls.
- Go to Settings > Connections > SIM card manager.
- Tap the SIM you want to activate.
- Slide the switch to On to enable the line.
- Name the SIM (e.g., "Work," "Travel") for easy identification.
- Set preferred SIMs for calls, messages, and mobile data. For calls, you can choose "Ask always" to decide each time.
Tips for managing two numbers on one phone
Adjust notification settings in your second number app to distinguish personal from work messages. Use your phone's contact organization features to group contacts by number, such as creating separate contact groups. Periodically review your second number's usage to ensure it still serves its purpose. Integrate your second number with apps like WhatsApp, Slack, and automation tools such as IFTTT or Zapier to streamline workflows, for example by forwarding voicemails to email or sending automated texts under specific conditions.
Best practices for privacy and security
Share your second number selectively for online registrations, shopping, and new services. Enable two-factor authentication on critical accounts using your second number for an extra layer of security. Regularly review where you have shared your number and revoke access if no longer needed. Be cautious with unknown contacts and never provide personal information like social security numbers or bank details without verifying the request. Use reputable providers with strong privacy policies and security measures. Understand that using a second number to impersonate others, harass, or evade bans is both unethical and illegal.
Frequently Asked Questions
Can I keep my original Google Voice number if I port a mobile number into it?
After that, you must choose to make the ported number permanent.
Do I need a separate data plan for a second phone number?
Not necessarily. Virtual VoIP numbers use your existing internet connection, while some carrier plans like Verizon's Second Number use your primary line's data. Traditional SIM-based second numbers require their own cellular plan.
Can I use a second phone number for two-factor authentication?
Yes, using your second number for two-factor authentication adds security by keeping verification codes separate from your primary number. Be sure to use a reputable provider that supports SMS or voice verification.
What happens to my second number if I change phones?
For virtual numbers, you simply log into the app on your new device. For eSIM-based numbers, you can transfer the eSIM to your new phone through your carrier. Physical SIM cards can be moved directly to a compatible device.
Is it legal to use a second phone number for business?
Yes, using a second number for business is legal. However, you must comply with telemarketing and spam regulations like the TCPA in the United States, and some services may require identity verification to meet local anti-fraud laws.
For the wider topic, see phone number formats and digits.
