Cellular coverage for some carriers approached normal levels in the northeastern U.S. a week after Hurricane Sandy made landfall, but some areas remained cut off from mobile service because of ongoing power and telecommunications outages, InfoWorld reports. Verizon Wireless said on Monday that 99 percent of its cell towers in the Northeast were online, up from 97 percent on Friday, while AT&T reported that more than 98 percent of its cell sites were operating. New York City and New Jersey remain the epicenter of cellular woes, though carriers continued to improve coverage there. AT&T said 95 percent of its sites in the city were up and running…