Despite the raising of the offer, and Deutsche Telekom's long-standing position to sell off its US arm, Iliad confirmed it will now drop the takeover attempt altogether.
Iliad pinned the blame on some of T-Mobile US' board members, who were "refusing to comply" with its latest offering.
In its acquisition attempt to snap up more than two-thirds of T-Mobile US, Iliad said it would have helped the combined entities save about $2 billion, while giving the French telco a foot in the US market.
Sprint was said to have made a bid for the company, but while it looked good on paper it was said to have been difficult to merge the networks. T-Mobile chief executive John Legere sent a strong signal earlier this year that a Sprint takeover was not on the cards.
But later on, the French company announced its bid to take off a part of T-Mobile from its parent Deutsche Telekom's hands. This sparked a bidding war between Sprint and Iliad, which resulted in the valuation of T-Mobile US to be around the $25 billion mark.
The deal could have gone ahead — at least in terms of the regulators calling the shots — should T-Mobile's board have gone along with the bid. That could not have be said for Sprint, whose bid would have put the combined cellular company in the league of Verizon and AT&T — likely concerning federal regulators.
Iliad said previously that it was adamant that its bid for T-Mobile wouldn't ruffle the feathers of Washington DC-based regulators, because the company does not have a presence in the US.
T-Mobile said recently at its fiscal second-quarter earnings that it topped 50 million subscribers. The phone giant also reported $391 million in profit, with earnings of $0.48 per share.
T-Mobile ($TMUS) fell by 3 percent in mid-afternoon trading on the New York Stock Exchange.