https://phys.org/news/2018-12-sprint-t-mobile-merger-green.html

The merger still needs the approval of the Federal Communications Commission.

Aside from competition issues, the proposed merger has raised eyebrows in the US because Chinese telecom giant Huawei—which Washington accuses of using its products for espionage—has trade ties with both Germany's Deutsche Telekom, T-Mobile's parent company, and Japan's SoftBank, which owns Sprint.