Reinvent your communication with the Onoff application

Discover the useful and awesome features of Onoff.

Use Onoff with your current number

Out of battery? A problem with your phone? Download the app on another smartphone to access your Onoff number.

Program the “On” or “Off” mode

You can deactivate your number at any time, or choose to receive only calls or SMS with a single click!


Switch to “On” or “Off” mode

On or Off! It’s up to you! You can deactivate your second number at any time, or choose to only receive calls or texts.


Communicate internationally

Many calls to other countries? Onoff allows you to communicate at local rates with international numbers from more than 20 countries.


Call from the Webapp

Prefer to use your computer for making calls? It’s now possible with the Onoff Web application.


Activate the ’’Onoff Calls’’

Enjoy the best call quality possible, thanks to “Onoff Calls”!

Synchronize your contacts

No time to lose, synchronize all your contacts from the application in just a few seconds.

Use your visual voicemail

Customize your voicemail or choose one of the pre-recorded messages.

Use Onoff Protability

Do you want to transfer your number to Onoff? With portability, it is possible to transfer a mobile number directly into the app.

Email Assistance

Didn’t find a solution to your problem? We will be happy to help, and our support team is at your disposal for any questions.

Take notes

With the Call Note, take notes during your calls via the Webapp. Find your notes in your call history.


Use VoIP outgoing calls

Make calls via a simple internet connection. Convenient when you are abroad for example.


Program your messages sendings

With Onoff, you can write your SMS and send it in the future. Just choose the date and time and it’s set up.


Send SMS to multiple recipients

Send SMS to as many different recipients as you want at the same time. The contacts you have selected will receive your SMS separately.


Call Forwarding

Forward your incoming calls to another number


Share your photos
and your videos by MMS

Share the moments that are important to you, by sending photos and videos to your contacts directly from the application!


Talk to your phone!

Send and receive voice messages, in case you cannot send an SMS or do not have the time to tap a long message.


Send and receive
your SMS smoothly

Use your second number to send SMS in a simple, fast and efficient way.


Call with your
2nd mobile number

Thanks to Onoff, start communicating! Make your calls directly from the app!

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