Product Information
What is Sideline?
Add another number to your smartphone with Sideline. Simply download the app, choose your number, and you’ll get a second number that works just like your first one. It’s that easy.
Unlike "cloud-based," "VoIP," or "virtual" phone systems, Sideline works with your existing carrier network, delivering the same quality and reliability as a regular mobile number. This also allows you to use the minutes you’ve already paid for—which might even be unlimited.
With Sideline, you can finally stop using your personal number for work, ditch that dusty landline, or quit carrying two phones. It’s essentially the work phone of your dreams (assuming you have very odd dreams).
How to use Sideline?
Sideline is a smartphone app adding a second phone number, using existing carrier networks for the same call quality and reliability as the primary number, helping separate work and personal communications while protecting privacy.
Core Functions of Sideline
VoIP Calls
Based on Phone Number
Phone calls
Usage Scenarios of Sideline
- Separate personal numbers from work numbers.
- Replace traditional landlines.
- Avoid carrying two phones.
- Share numbers in public to protect personal privacy.
- Contact strangers or businesses.
- Buy and sell goods online.
Common Questions about Sideline
What does Sideline do?
How do I use Sideline?
What are the core features of Sideline?
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