[6] According to its own published data, Swisscom holds a market share of 56% for mobile, 50% for broadband and 37% for TV telecommunication in Switzerland.

In 2007, Swisscom acquired a majority stake in Italy's second-biggest telecom company Fastweb.

Switzerland's entry into the telecommunications era came in 1851, with the passage of legislation giving the Swiss government control over the development of a telegraph network throughout the country.

The government's initial plans called for the creation of three primary telegraph lines, as well as a number of secondary networks.

One year later, the first intercity telephone line was established, linking Zürich's private exchange with Winterthur's public system.

In 1966, PTT introduced automated international dialing services, initially from Montreux and achieved full coverage in 1982.

Although the Unisource partnership attempted to enter a number of markets around the world, including Malaysia and India, it deintegrated after several years of losses.

As part of that process, Telecom PTT was transformed into a special public limited company, its name was changed to Swisscom on 1 October 1997, its shares were listed on the Swiss Stock Exchange, and it conducted a public offering of its shares in 1998.

In 1999, the company acquired Germany's publicly listed Debitel, then the third-largest mobile services provider on the German market.

The company formed six primary business units, and in 2001, it sold a 25% stake in Swisscom Mobile to England's Vodafone.

[10] The former state-owned PTT was privatized in several stages from 1988 onward and became a public limited company with special legal status in October 1998.

[23] As of June 2018, Swisscom ranks on Forbes "The World's Largest Public Companies" list, the Global 2000,[24] at number 520.

[25] In June 2015, Swisscom Hospitality Services became part of a new company, Hoist Group, following its acquisition by the Sweden-based HoistLocatel.

[26] In June 2018, Danish software firm Nordija partnered with Swisscom to develop TVaaS 2.0.

[31] At present, the company delivers 5G service in 110 cities and villages including Zürich, Geneva and Bern as well as rural and touristic regions.

[32] On 1 June 2022, Urs Schaeppi stepped down from his position as CEO of Swisscom and was succeeded by Christoph Aeschlimann.

[33] On March 15, 2024, Swisscom signed a binding purchase proposal to acquire 100% of Vodafone Italia for €8 billion, with the goal of merging it with Fastweb.

As part of the agreement, Vodafone will continue to provide certain services to Fastweb, as well as grant the use of its brand for a maximum period of five years.

67% of respondents expressed opposition to the sale of the federal government's stake in the telecommunications company, while only 26% were in favor (the rest were undecided).

[42] Swisscom announced that the European Commission had approved the acquisition of Vodafone Italia under the Foreign Subsidies Regulation.

The previous names "Swisscom TV", "Bluewin", "Teleclub" and "Kitag Kinos" have disappeared.

Fastweb S.p.A. operates the second largest network in Italy and offers voice, data, internet and IP TV services to private and business customers.

Other brands, such as cablex and localsearch, are in Swisscom's portfolio and characterise the company's other areas of business.

[57] Through its venture capital arm, Swisscom promotes start-ups developing solutions in the field of information, communication and entertainment technology.

[59] In 2021, Swisscom was rated the Swiss mobile communications provider with the best network by the trade journal "Connect", closely followed by Sunrise.