T-Mobile has agreed to pay a $17.5 million fine to the US Federal Communications Commission. The fine will settle an investigation of the wireless carrier by the FCC due to two separate nationwide 911 outages on T-Mobile's network that happened on August 8, 2014.

The FCC stated:

In its investigation, the Enforcement Bureau found that T-Mobile did not provide timely notification of the August 8, 2014, outages to all affected 911 call centers, as required by FCC rules. The investigation also found that the outages would have been avoided if T-Mobile had implemented appropriate safeguards in its 911 network architecture.

In addition to the fine, T-Mobile has agreed to add in new procedures in order to find risks that could disrupt 911 service on its network, send out faster notifications to call centers if such an outage occurs in the future and recover quicker from those disruptions.

T-Mobile has sent over their own statement on the FCC settlement to Android Central:

The safety of our customers is extremely important and we take the responsibility to provide reliable 911 service very seriously. We have made significant changes and improvements across a number of our systems since last year, and we will continue working to improve these critical systems with our partners to provide the standard of service our customers rightly expect from T-Mobile.

Source: FCC