Your second number
with the Onoff app!

Reinvent your communication.
Download the app and get a second number instantly!


Join the revolution !

Thanks to its revolutionary patented technology, it allows you to own several mobile numbers in your smartphone. No need to have another SIM card or another device.

Play Video

The Features

Want to get a second number instantly? Send or receive SMS, or even have a direct access to a voicemail, and all of this from an app? Then, it’s On! Onoff is made for you.

Enjoy the best of the best!

The Premium offer allows you to have a better call quality, to launch or receive calls from your desktop computer, to plan when you would like to be reached or to have several devices ring at the same time!

Get a second number with just an app!

Use your SIM Card your for personal number.  Use the app for your second number.


Simple and practical offers

Discover our new Premium offer dedicated to independent workers and freelancers.


Instantly get a second mobile number on your smartphone

from 4,99€ / incl. VAT per month

from 14,83€ for an international number

Popular choice


Go even further by taking advantage of our premium features

from 7,99€ / incl. VAT per month

from 17,83€ for an international number

Need phone numbers for a professional usage?

Onoff Business is the best solution to help save time, be efficient and reduce costs.

Join the Revolution now!

Get a second number to optimize your communications.


Onoff Telecom est un opérateur de télécommunications reconnu par l’ARCEP

738 rue Yves Kermen
92100 Boulogne-Billancourt, France

Viru Väljak 2, Tallinn
10111 Estonia

©2022 Onoff Telecom