The FCC said July 21 that AT&T indicated that it now relies on new models to support the approval of its merger, and stopped the “shot clock” on its review of the merger.

In the Thursday filing, Sprint representatives told FCC officials that the series of later filings about these new models “make it difficult for Sprint and other interested parties to offer timely and meaningful comments.”

“The Applicants [AT&T and T-Mobile] should not be allowed to get a ‘second bite at the apple’ (let alone a third or more bites) after failing in the Applications and Opposition to establish that the proposed transaction will promote the public interest,” Sprint said in the document.

In response to the filing, Jim Cicconi, AT&T’s senior executive vice president of external and legislative affairs said in a statement that the company’s filings on the model “confirms the compelling evidence previously submitted as to why our merger should be approved.” Cicconi added that it “doesn’t surprise us one bit that Sprint would argue that it be ignored” and that its arguments are a “sign of desperation.”