Sideline: 2nd Phone Line App

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Better. Faster. More Reliable. That's our motto for every update. And in this release, performance updates make Sideline all of those things.

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Sideline: Private Second Phone Number for Calling & Texting

Sideline gives you a private second phone number with reliable text and call quality—so you can call and text without sharing your personal number. With unlimited calling and texting, your second number works just like your first, while helping you keep your real number separate and protected.

Just pick your area code, then send text messages and make phone calls wherever you are using your phone’s cellular signal. Sideline works without WiFi (not VoIP), so you can call without WiFi and stay connected with consistent, carrier-level reliability.

You can rely on Sideline to keep your personal phone number private while organizing calls and texts on a separate number.

SIDELINE FEATURES

Second Phone Number + Local Area Code
- Get a second phone number with an area code of your choice
- Call without wifi using your existing cellular connection (not VoIP)
- Includes voicemail, caller ID, SMS texting, MMS, and premium call quality
- Unlimited calling and texting from your second number

Private Texting & Calling:
- Send SMS, MMS, and text messages without sharing your personal phone number
- Use your second number for private texting anytime
- Reliable calling and texting that works wherever your carrier works

Powerful Communication Tools:
- Automatically reply to missed phone calls with a customizable text message
- Share photos, videos, and GIFs from your second phone number
- Assign “Favorite” contacts for quick access

Full-Featured Second Phone Line:
- Create a custom voicemail greeting and read voicemail transcripts
- Use calling and texting tools across multiple devices
- Identify new callers, save contact details, and take notes after calls
- Incoming calls are clearly labeled, so you know when it’s your second number vs. your main number

FREQUENTLY ASKED QUESTIONS
- What is Sideline, and how does a second phone number work?
- Sideline is a second phone number app that lets you call and text from a separate number on your existing smartphone. Just download the Sideline app, and your Sideline number will work alongside your primary number, so you can keep personal and secondary communications separate without needing a second phone.

- Can I use Sideline for private texting and calling?
- Yes. Sideline is designed for private texting and calling, so you don’t have to share your personal phone number with strangers and businesses. Use your second number for work, online selling, dating, or any situation where you want more privacy.

- Is Sideline reliable for calls and texts?
- Sideline uses your carrier’s cellular network (not VoIP), which means your calls are clear and reliable—just like your regular phone number. You can send unlimited SMS and MMS messages and make calls with confidence.

- Can I choose or transfer my phone number?
- Yes. You can select a second phone number with an area code of your choice, or port (transfer) your existing number to Sideline. This makes it easy to keep a number you already use while gaining more privacy and features.

- Who is Sideline for?
- Sideline is for anyone who wants a second phone number to keep their personal number private and their communications organized—like professionals and business owners who don’t want to carry a second phone, people buying and selling online who don’t want to share their real number, freelancers who need to separately manage client communications—and anyone who values privacy and wants to control who can reach their real number.

DOWNLOAD SIDELINE TODAY
Get a second phone number for private texting and calling. Stay connected—without giving out your personal number.

LEGAL

© 2026 Pinger, Inc. All rights reserved. The TextFree name, associated trademarks, and logos are trademarks of Pinger, Inc. or related entities.

Terms of Service: https://www.sideline.com/terms-of-service/
Privacy Policy: https://www.sideline.com/privacy-policy/

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