2 numbers,
1 phone.

2 numbers, 1 phone.

A separate line, with a separate inbox, in a separate app, on the phone you already have. That's Sideline Standard.

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Protect your privacy.

With your primary number separate, Sideline lets you stay safe and anonymous whenever you need to.

See which number is ringing.

Custom caller ID makes it clear which number is ringing so it's easy to prioritize calls and answer accordingly.

Call with confidence.

Sideline works with your existing carrier network (not VoIP) to deliver great call quality anywhere your phone has service.

Powerful features built for your mobile life.

2nd Number
2nd Number

Get a second phone line for calls, texts, voicemail, and more.

Avoid Spam
Avoid Spam

Sideline detects spam calls, telemarketers, and potential fraud so you can easily avoid them.

Auto-Reply
Auto-Reply

Send an automated text reply to any missed calls or messages.

Voicemail
Voicemail

Record a separate greeting so people can leave a message after the beep.

Unlimited Messaging
Unlimited Messaging

Send unlimited SMS, MMS, and group messages.

Web Texting
Web Texting

Take the conversation to a bigger keyboard with the web texting portal.

Number Porting
Number Porting

Already have a second number? Bring it to Sideline from another device or landline.

Ring and Text Tones
Ring & Text Tones

Differentiate between numbers with unique ring and text tones.