Imagine getting a second phone number instantly—without needing a second phone or SIM card. That’s exactly what Onoff delivers. Whether you need a separate line for work, to protect your privacy when buying or selling online, or simply want to simplify life with one phone, Onoff gives you a fully functional second number through a single app.
Just download the Onoff app, pick a number, and start calling, texting, and managing your second line effortlessly.
Get a Second Number Instantly
With Onoff, you can have a second number in just a few taps. Ideal for professionals, online sellers, travelers, and anyone who wants to keep personal and business communications separate.
· Choose from numbers in 30+ countries
· Make low-cost international calls
· Use your number across devices—even from your web browser
Full Communication Suite
Onoff is more than just a number—it’s a complete communication hub.
· Unlimited calls and SMS
· Visual voicemail with customizable greetings
· Voice messages for when texting isn’t convenient
· MMS support for sharing photos and videos
Flexibility and Portability
Use your Onoff number from any phone or computer. Out of battery or lost your device? Log into another and pick up where you left off.
· Use the Onoff Web App to call and text from your desktop
· Transfer (port) your existing number into the Onoff app
· Forward calls, schedule texts, and send group SMS messages
Privacy and Control
Your safety and control come first. With Onoff, you can easily manage when and how you’re reachable.
· Toggle your number on or off anytime
· Decide whether you receive calls, SMS, or both
· Keep your personal number hidden when communicating
VoIP Calling and Notes
Call over Wi-Fi or mobile data (VoIP) for added convenience—especially helpful while abroad. Need to jot something down during a call? Use the built-in Call Note feature to record thoughts in real time.
FAQs
1. How does Onoff work?
Onoff gives you a second phone number through an app—no need for another SIM or phone. Just download the app, choose a number, and you're ready to call and text.
2. Can I use Onoff internationally?
Yes! Onoff supports numbers from over 30 countries and lets you make low-cost international calls. If you’re in Europe, calls are unlimited.
3. Can I keep my current number?
Absolutely. Onoff supports number portability, allowing you to move your existing mobile number directly into the app.
4. What devices is Onoff compatible with?
Onoff works on any smartphone and via web browser. It’s SIM-independent, so you can access your number from anywhere.
5. How much does it cost?
You can subscribe to a number or calling plan via the app. Prices vary by region and duration (1, 3, or 12 months). International calling credits are also available.
Version History
v5.2.2.0—7 May, 2025
-Updated app logos and icons
-Minor bugfixes
v5.2.1.0—26 Apr, 2025
-Updated app logos and icons
-Minor bugfixes
v5.2.0.0—22 Apr, 2025
-Updated app logos and icons
-Minor bugfixes
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