Newly released documents show T-Mobile considered a merger with the media giant Comcast, in addition to its merger with Sprint, in a plan to create one of the biggest companies in the world

• T-Mobile's planned merger with Sprint faces ongoing scrutiny from federal regulators, and the "Un-carrier" is reportedly renegotiating terms of the deal.
• T-Mobile has been working on a merger with Sprint for several years, but that's not its only step in its plan to become one of the biggest companies in the world, according to a recently published company roadmap.
• Internal T-Mobile documents made public as part of its investigation by federal regulators, first published by The Verge, reveal that, at the end of 2015, the company was considering an acquisition by an especially notable suitor: Comcast.
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T-Mobile has been planning a merger with Sprint for years in a bid to better compete with competitors like Verizon and AT&T. The merger was given the green light by the Federal Communications Commission in November, but it has been met with intense pressure by state and federal regulators.

As part of the scrutiny into T-Mobile, new documents made public on Monday, and first reported by The Verge, revealed a roadmap for the company, including a potential merger with the telecommunications and media giant Comcast.

The documents, from December 2015, show that T-Mobile had considered a two-step merger: First, merge with Sprint, then merge with a cable company, with the top choice being Comcast.

The roadmap, titled "Defining a Winning Business Position for the US Business Model," appeared to be presented to executives of the company and was compiled in part with the management consulting company McKinsey & Co. T-Mobile initially tried to withhold the documents from the public, arguing that the report's authorship by a third-party, in this case McKinsey, required confidentiality. That argument was not accepted and the documents were made public on Monday.

The logic T-Mobile provided for a subsequent merger with Comcast offers a rare, candid look into how the company thinks about its US business in the long term.

The document points to T-Mobile's worth to Comcast: "Move into mobile might be only natural option for Comcast to grow," it said. "Preferred Comcast moves are unlikely to get approval."

In laymen's terms, T-Mobile sees its value to Comcast as a means of skirting federal regulators' concerns with conglomerates. Rather that Comcast having to move into mobile markets itself, the cable giant could simply merge with T-Mobile as a side-door in.

The document showed that the mobile carrier also considered mergers with other major names in cable, including Brighthouse and Charter. However, it's unclear how - or if - the company's position has changed since late 2015 when the report was issued, or how seriously the report was taken by the company at the time. T-Mobile representatives did not respond to a request for comment.