AT&T made claims last week that didn’t sit well with Verizon Wireless. In a series of advertisements, AT&T said that it now operates America’s most reliable 4G LTE network. A Verizon spokesperson previously told BGR that “AT&T can make up whatever claim they want,” adding that Verizon will “let consumers make the ultimate decision.” Building on that response, the company also took out an advertisement in The Wall Street Journal on Monday. As spotted by CNET, Verizon acknowledged that “others have tried to claim reliability,” adding that reliability is “not a hollow claim. Or a slogan. Or a fancy ad campaign.” The company also cited its track record for reliability and recent investments it has made to further improve its network, along with third-party data from RootMetrics that praised its call, text and data performance. Verizon’s full ad follows below.