Connectivity as the Backbone of Your Business

CETIN is enabling digital transformation by providing secure and reliable communication infrastructure solutions.


CETIN operates a top-quality telecommunication portfolio, encompassing the full scope of mobile access network infrastructure across Serbia, extensive fiber and wireless backbone, and aggregation networks and data centers. ​
Our nationwide coverage and extensive expertise allow us to provide a unique combination of wholesale telecommunications, security, and IT services to a wide range of regional and local, public, and private sector players, whose business relies on digital technologies. ​
Yettel uses the CETIN services portfolio for providing telecommunications services to its end customers.


CETIN is part of CETIN Group, one of the largest telecommunications networks across Central and Eastern Europe.

Driven by innovation and true entrepreneurship, CETIN Group companies were formed due to a successful structural separation of infrastructure business from O2 in Czechia in 2015, and Yettel branded operators in Hungary, Serbia, and Bulgaria in 2020.


The first mobile network in Serbia launched in 1994, was based on network infrastructure owned by CETIN.

Nowadays Yettel's 2G, 3G, 4G and pioneering 5G mobile network services are fully powered by CETIN network and expertise. CETIN is leader in planning, building, operating, and maintaining networks in Serbia, securing wide availability, high reliability, security and exeptional quality.

Our Leadership

At CETIN, we believe in the talent and uniqueness of each of our employees.

We are glad that we are led by truly human and professionally experienced leaders who are not afraid of any challenge. Most of them have been with us for many years, and we are proud to be able to provide them with sufficient background for their professional growth.

Benchmarks That We Are Proud of


EUR revenue in 2023




of the network and data centers powered by renewable energy​


time in a row as the "best in test" mobile network according to Umlaut methodology

Our Management Systems

By using the latest technology and carefully designed work processes, our network provides the necessary protection of information confidentiality, integrity, availability, data privacy, and other assets by managing safety, security, and business risks proportionally and effectively. Following the best practices and implementing the highest industry standards we develop and maintain a good business environment.

Our Values

Get to know the 4 pillars that are the foundation of the entire CETIN Group.



We anticipate and deliver
We strive to understand, anticipate, and serve the needs of our customers and their end-users. We are here to help them perform better and faster. By keeping our promises, we provide an excellent user experience.


Respect and teamwork
We are proud of our talented, skilled, and motivated colleagues. Ensuring professional growth and well-being is our priority. We believe that respect, open communication, and teamwork create the best foundation for success and a friendly workplace.


The Backbone of our Existence
We are passionate about the technology that is the backbone of our existence. We design, build, and operate high-quality networks and provide innovative solutions without any compromise on security.


Communities and Innovators
We are proud members of the diverse communities, that we live in, and help them thrive. We also choose to partner with innovators who, like ourselves, believe that communications technology and services are here to improve the quality of life.