Swisscom had no comment on Monday on weekend newspaper reports that its German mobile unit, debitel, was interested in buying Danish-owned Talkline.
The Swiss-German Sunday paper, the "SonntagsZeitung", said debitel would pay SFr400 million ($227 million) for German mobile company, Talkline, currently owned by Denmark's TDC A/S.
The paper added that a France Telecom unit, Mobilcom, and the 3G consortium of Telefonica and Sonera were also interested.
"We have no comment on market rumours," said Swisscom spokesman, Christian Neuhaus.
He added that the Sunday newspaper, which cited him as saying "for the time being, that is a rumour", had misquoted him.
Company sources said any interest by debitel for a company like Talkline would signal a change in corporate strategy.
The firm is currently a network-independent reseller of capacity and has been signing up collaboration deals for 3G Universal Mobile Telecommunications Systems (UMTS) - a new generation of mobile telecommunications, which will permit high data transmission rates and allow multimedia services.
swissinfo with agencies