The US wireless carrier reportedly rejects Iliad's request for financial information because its proposal for a controlling stake in the company is too low.
French telecom provider says T-Mobile and parent company Deutsche Telekom refused to entertain its new offer.
Iliad has lined up new financial backers for another run at the Uncarrier, according to Bloomberg.
The French company doesn't want to pay more on its own, but is rounding up allies to help persuade Deutsche Telekom to sell its controlling interest in the US carrier.
Wireless consolidation may be taking a breather, but interest in T-Mobile appears to remain strong.
The French telecommunications company is making a play for T-Mobile, according to The Wall Street Journal.
Commentary: From "Star Wars" to "The Hobbit", CNET pop culture addict Richard Trenholm investigates whether prequels are just fundamentally rubbish.
Negotiations with Hutchison Whampoa could mean subscribers get free use of mobile phone networks in the UK, Hong Kong, and other countries, according to the UK's Independent.
T-Mobile's majority owner has already rejected one offer from French carrier Iliad and watched its deal with Sprint fall apart.
In an interview, outspoken John Legere talks about the suddenly lively Sprint as a competitor, the failed merger with Sprint, and his thoughts on BlackBerry.