Since December 2014, Telenor has partnered with Swedish operator Telia to deliver a joint mobile network across Denmark.

Sonofon was founded as a company in 1991 as a joint venture between GN Store Nord and BellSouth Corporation.

Sonofon launched its services in September 1992 and saw its mobile base grow rapidly to half a million users by 1996.

In May 2007, Telenor announced the purchase of the Danish operations of the competing ISP Tele2,[1] with the Danish commission of monopoly approving the purchase (later the approval was announced to the press, currently the main press release).

The company has its own nationwide core network, and serves both consumer and business customers.