Sprint Corp. and T-Mobile US Inc. will submit an application with the Federal Communications Commission on June 18 seeking approval for their proposed merger, Reuters reported June 15, citing an official document.

The document, filed with the FCC on June 14, also includes a request for "a protective order that would shield sensitive corporate information" from the public.

A report earlier this month indicated that the U.S. Department of Justice is investigating the impact of the proposed merger on smaller wireless operators.