Sunrise on Thursday set a price range for its forthcoming IPO that values the company at up to €3.3 billion.
The Swiss operator formally launched its initial public offering with the publication of its prospectus and the start of the book building process.
At an IPO price of 58 francs-78 francs (€0.58-0.78) per share, the listing values the telco at CHF2.8 billion-CHF3.3 billion (€2.8 billion-€3.3 billion).
Sunrise hopes to raise CHF1.35 billion to strengthen its balance sheet and reduce the cost of its debt.
It will begin trading on the SIX Swiss Exchange on or before 6 February.
"The overall telecoms sector across Europe and in Switzerland i s benefitting from the strong growth in mobile data and convergence, and our IPO will help us make the most of these opportunities, whilst strengthening our positioning as an innovative and customer-centric market leader," Sunrise CEO Libor Voncina said, in a statement.
Sunrise reiterated its previous commitment to an attractive shareholder distribution policy following the IPO. When it announced its intention to list earlier this month, Sunrise promised a dividend of CHF135 million for 2015 and pledged to pay out at least 65% of equity free cash flow from 2016 onwards.
Sunrise has been under the control of private equity firm CVC Capital Partners since late 2010. CVC bought the telco from Danish incumbent TDC for CHF3.3 billion.
At the time of writing the Swiss franc was trading at the same rate as the Euro.
