T-Mobile is certainly a company in transition, especially following AT&T’s failed $39 billion bid for the country’s fourth largest wireless service provider and the departure of CEO Philipp Humm for rival Vodafone. And here’s the latest evidence that the Bellevue carrier is charting a new course.

The Wall Street Journal reports today that Houston-based Crown Castle International is the lead bidder for about 7,000 of T-Mobile’s cell towers in the U.S., a deal that could bring in more than $2 billion.

The Journal, citing sources familiar with the matter, said a deal could be struck soon between cell phone tower operator Crown Castle and T-Mobile. Other possible bidders include American Tower and Global Tower Partners, with the Journal noting that tower deals are particularly complicated.

T-Mobile is looking to raise cash in order to expand its network in an effort to keep up with AT&T and Verizon, both of which are adding fast LTE networks. As part of the break-up fee with AT&T, T-Mobile received $1 billion worth of spectrum and $3 billion in cash from AT&T.

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