Unlimited phone numbers on a single device.
Gone are the days when you were limited by the number of SIM card slots on your phone. Download the onoff App and get as many numbers as you want from all over the world in a matter of seconds!
Make high quality international calls at affordable prices.
We combine telecom and internet technologies to bring you the most reliable connections at the lowest prices. Download the onoff App for free and enjoy one of our many international packages!
Organise your life by phone number.
Have a phone number for every group of people you communicate with, and keep track of them effortlessly. Dating, work, family, travel and anything else you can think of! Download the onoff App and manage all the aspects of your life from a single place.
Reinvent your communications with onoff
Mobile numbers from 3.49 €/month
Get An International Number In Less Than A Minute
International calls for as low as 0.03€ per minute
Numbers
onoff reinvents communications by bringing telecom technologies into the app world, allowing you to have multiple phone numbers on the same device.
Cloud
Your numbers are stored in the cloud so you can enjoy the superior speed and quality of telecoms with minimal internet connection.
onoff Business
Our business solutions offer incredible flexibility and competitive prices.
Number Portability
Our virtual portability allows you to easily transfer SIM numbers into the app. (Currently only available in France).
Voicemail
Customize your voicemail greetings for each of your numbers separately.
Coming soon!
Travel
With number portability between countries, your number can follow you wherever you go.
Calling Abroad
The onoff technology allows you to call or text any international number at the best rate
Communicate Freely
Send free messages to other onoff users