It flooded the FCC's online system with over 2,500 comments, many of them protesting AST’s plan to use the spectrum. AST SpaceMobile finally responded by telling the FCC that it has designed its ...

The problem is not just about how many satellites are in the sky, but also about how strong their unintended signals are and where they appear on the radio spectrum.

AST wants to use the 430 to 440MHz band for a satellite-to-phone service. Ham radio enthusiasts say the company's plan is vague and could interfere with their slim slice of spectrum.

AST SpaceMobile plans to use the spectrum in a limited capacity. Still, it faces fierce pushback from amateur radio groups, some of which claim interference is already happening.