T-Mobile and Sprint ask for merger approval

A T-Mobile and Sprint store next to each other
If T-Mobile and Sprint are allowed to merge it will reduce the number of major wireless carriers. Photo: Justin Sullivan/Getty Images

T-Mobile and Sprint have formally asked the Federal Communications Commission to approve their proposed merger, according to documents filed Monday and posted Tuesday by the agency.

Why it matters: The deal would be the latest consolidation in the telecom industry — where AT&T just acquired Time Warner — and take the number of major national wireless carriers from four to three.