T-Mobile has responded to critics of the proposed deal for AT&T to buy the Bellevue-based mobile company for $39 billion.

The most vocal critic of the deal has been Sprint, the third leading wireless carrier behind Verizon and AT&T. Sprint last month filed a formal 377-page complaint to the Federal Communications Commission in which the companied urged the FCC to block the deal or risk creating a duopoly in wireless communications between AT&T and Verizon.

“The proposed transaction would turn back the clock on competition and innovation and bring this era of unprecedented wireless expansion and technological innovation to an abrupt, but avoidable, halt,” Sprint wrote in its May 31 complaint.

In response, T-Mobile Senior Vice President of Government Affairs Tom Sugrue released a statement Tuesday slamming the critics.

“The opponents of the AT&T-T-Mobile merger have had their final say as part of the FCC‚Äôs formal pleading cycle and, not surprisingly, they have failed to offer any credible arguments to support their view that the Commission should deny the transaction,” he said.

Sugrue went on to say that critics of the deal are shortsighted in their refusal to believe a capacity issue exists. As the abilities of smartphones continue to progress, the evolution can only go as far as capacity will allow it. As part of the deal, AT&T will likely have to build out 4G and broadband lines to rural and other underrepresented areas.

Sugrue believes the FCC sees this future issue and will sign off on the deal.

“The FCC has long acknowledged the harmful consequences of ignoring the spectrum crunch, and we are confident it will approve our proposed market-based solution.”