Since then, Deutsche Telekom has consistently featured among Fortune Magazine's top Global 500 companies by revenue, with its ranking as of 2023[update] at number 79.

[10] Until the early 21st century, Deutsche Telekom controlled almost all Internet access by individuals and small businesses in Germany, as they were one of the first German telecom units.

In October 2012, Deutsche Telekom and Orange created a 50-50% joint venture named BuyIn for regrouping their procurement operations and benefiting from economies of scale.

[14] In February 2014, Deutsche Telekom acquired the remaining parts of its T-Mobile Czech Republic division for around €800 million.

[16][17] BT Group announced agreement in February 2015 to acquire EE for £12.5 billion[18] and received regulatory approval from the Competition and Markets Authority on 15 January 2016.

[24] In February 2020, Deutsche Telekom joined a new partnership called HAPS Alliance to promote the use of high-altitude vehicles in the Earth's stratosphere with the goal of eliminating the digital divide.

In September 2021, Deutsche Telekom sold T-Mobile Netherlands for €5.1 billion to the investment companies Apax Partners and Warburg Pincus.

DT’s subsidiary, Deutsche Telekom MMS provides the Ethereum Network with infrastructure in the form of validation nodes.

Deutsche Telekom's T-Mobile billing was performed on Israeli-backend systems until 2014, when Ericsson was selected to replace the Israeli backend.

The products include Voice Termination, Ethernet, IP-Transit, Mobile and Roaming as well as In-flight Internet Access for the aviation industry.

Together with Inmarsat and Nokia, Deutsche Telekom develops a hybrid network for faster internet access on board the planes in Europe.

It is a combination of data transmission via Inmarsat Satellite and Deutsche Telekom's LTE ground stations throughout the European continent.