Atos OneContact, your Atos Team just one click away Atos OneContact is a unified user support solution. For end-users, it provides access to user support right at the fingertip with multiple communication channels – chat, voice, callback and email – anytime, anywhere and on any device. The application has been designed to support different location and languages. Atos OneContact is proactive in providing up to date information that’s relevant to you such as news, disruption, and maintenance.