Monitoring report 10/2026: Optic fibre networks continue to strengthen, data consumption is growing; CTU warns about the risks of AI-generated submissions

Prague, 20 October 2026 – In our October monitoring report, we summarise the key developments in the Czech telecommunications market in 2025 and the expected trends up to 2028. Data consumption continues to grow, investments are shifting more significantly towards fixed networks, and the number of fibre-optic connections is now closing in on WiFi access, which has been the most widespread option to date. We also draw attention to the growing number of submissions created using artificial intelligence tools. Whilst these can be a useful aid, their outputs must be checked before submission.

In our October monitoring report, we summarise the key developments in the Czech telecommunications market in 2025 and the expected trends up to 2028. Data consumption continues to grow, investments are shifting more significantly towards fixed networks, and the number of fibre-optic connections is now closing in on WiFi access, which has been the most widespread option to date. We also draw attention to the growing number of submissions created using artificial intelligence tools. Whilst these can be a useful aid, their outputs must be checked before submission.    

Fibre-optic catching up with Wi-Fi, data consumption growing

In 2025, the Czech telecommunications market continued to reflect a long-term shift towards faster connections and higher data consumption. The number of fixed-line internet connections approached 4.3 million, with FTTH/B fibre-optic networks already accounting for 25 % of these – just one percentage point less than Wi-Fi. There were more than 1.07 million active fibre-optic connections, a year-on-year increase of 12.3 %, and the CTU expects fibre-optic technology to become the most widely used fixed-line access technology as early as this year. The volume of data transmitted is also growing significantly: in fixed networks, the average per active connection was over 428 GB per month, whilst in mobile networks, average monthly consumption exceeded 15 GB per SIM card used for mobile internet. By 2028, the CTU expects further growth in fibre-optic networks, mobile and fixed data traffic, as well as IoT and M2M services. Read more on the front page of the Monitoring Report.

​The Office warns of the risks associated with submissions generated using AI

In its day-to-day work, the CTU is increasingly encountering submissions created with the aid of artificial intelligence tools. AI can assist with gaining a basic understanding of an issue or with stylistic editing of a text; however, its outputs may contain inaccurate, out-of-date or entirely fabricated information. In practice, for example, we are seeing lengthy texts with repetitive content or references to non-existent or obsolete statutory provisions and case law. Verifying such information may unnecessarily prolong an investigation. We therefore recommend that complainants describe their issue, first and foremost, clearly and in their own words. It is not necessary to quote legal provisions or prepare specialist legal statements; should any further information be required, the CTU will request it. We wish to reassure complainants that they need not worry that their statement being too brief or simple will result in their case not being investigated. Electronic forms available on the CTU ePortal may also be used for communication. See page 9 of the Monitoring Report for further details.