You may have to wait a while to take advantage of C-band 5G's potentially higher speeds. The Wall Street Journal has learned that AT&T and Verizon are delaying their C-band rollouts by at least a month to help the Federal Aviation Administration address aircraft interference concerns. They had originally planned to use the newly available frequencies on December 5th, but AT&T said it was pushing its launch to January 5th after the Transportation Department requested a delay. Verizon hasn't formally confirmed its delay, but it will reportedly move the C-band 5G deployment by "about a month" in…