It is based in Paris and its operations comprise fixed and mobile telephony services, prepaid phone cards and Internet access providing and hosting services.

[1] Free Mobile, a subsidiary of Iliad, was launched in 2012.

As of December 2013, it was France's fourth largest mobile operator, having gained a 12% share of the market.

[2] On August 1, 2014, Iliad publicly announced a bid to acquire a 56% stake in the United States wireless carrier T-Mobile for US$16 billion.

The bid came amidst reports that competing carrier Sprint Corporation, owned by Japanese firm Softbank, was planning its own US$24 billion merger.