A real phone number
Choose a local area code (if you want) and get a 2nd number on your smartphone.
Carrier reliability (not VoIP)
Calls use your carrier and minutes (which are likely unlimited) so everything just works.Learn more
Texting is free and unlimited. Sideline's inbox puts all your communication in one place.
Transfer your number
Don't need a new number? Number porting lets you move existing numbers to Sideline.Learn more
Record and manage multiple voicemail greetings for your Sideline number.
Know who's calling
Separate caller ID, notifications and ringtones let you know who's contacting you.
Get your voicemails transcribed and read them as a text message.Learn more
Send automated messages to any incoming call or text when you're away or busy.
Reliability like no other
Calling works with your cellular network and minutes (which are probably unlimited). This lets you share minutes between two lines and gives the same great call quality you get from your regular number.Learn how it works