4142 Duo – Business Prefix is ​​the app designed to simplify the use of the 4142 prefix, dedicated to the Coop Duo business service.
It allows you to make calls with the correct prefix automatically and hassle-free, ideal for those who need to manage both work and personal numbers.

📞 Main Features

Automatic 4142 prefix: the app prefixes the Coop Duo business prefix before the number, avoiding errors or forgetfulness.

Integrated keypad: dial numbers directly from the app, pre-set with the correct prefix.

Call history: Quickly review calls made through the app.

Favorite numbers: Save your most used contacts for instant dialing.

Notes: Record notes and useful information related to contacts or calls.

Simple and intuitive interface: designed for quick use, even in a business environment.

4142 Duo is designed for those who use the Coop Duo prefix on a daily basis and want a practical, tidy and immediate solution.