The French telecommunications company ended its pursuit, despite having increased the size of the stake it was willing to acquire and the price it was willing to pay.
Lookout, a seven-year-old mobile security company with 50 million users, has attracted $150 million from investors led by T. Rowe Price Associates.
When Sprint officially announced on Wednesday that it had abandoned its plans to buy T-Mobile, John J. Legere, chief executive of T-Mobile, had plenty to say.
Sprint and its corporate parent, the Japanese telecommunications giant, conceded that antitrust regulators would block a deal.
The move by Iliad, the fourth largest cellphone operator in France, would be a huge test of its financial capabilities and comes as T-Mobile and Sprint have been in merger talks.
E-commerce in India is attracting buyers in a society where Internet access is increasing, and international investors are starting to take note.
France’s largest telecommunications company and Bouygues Telecom, the nation’s third-largest mobile provider, had discussed partnerships or a potential merger.
Com Hem, which was acquired by the private equity firm BC Partners in 2011, priced its offering at 58 Swedish kronor a share, giving it a market capitalization of about $1.7 billion.
The takeover would add to the size of Level 3 Communications, already one of the biggest providers of back-end Internet services in the United States.
Antitrust regulators in Washington will have to assess whether a combined wireless company would be good for consumers.
A rush of multibillion-dollar acquisitions has reshaped the United States wireless market in the last three years, and it is hard to see what meaningful assets remain.
No one has pushed for a merger of Sprint and T-Mobile harder than Masayoshi Son, the chief of SoftBank. And unlike many of his billionaire peers, Mr. Son isn’t afraid of expressing himself.