The majority state-owned company said the fast technology was made available across more than 100 locations in 54 cities and towns in the early hours of Wednesday.
The company said it was given the right to use the new frequencies by the telecoms regulator for 15 years.
The networks were put in place in partnership with Swedish telecoms company Ericsson.
Concerns
The announcement from Switzerland’s largest telecoms company comes as four cantons in western Switzerland, Vaud, Geneva, Neuchâtel and Jura, moved to suspend authorisations for new 5G mobile antennae, pending a government report on their safety.
A working group is to present the results of a study to the Swiss government by the end of June.
5G is divisive in Switzerland. While some people say it’s indispensable for economic development, others are afraid of the increased radiation coming from the antennas. The result is that antenna construction projects are running into petitions, political interference and opposition.
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