SoftBank Group Corp. suffered a major disruption to its telecommunication service Thursday that lasted for hours and may have affected millions of users across Japan, including preventing people from making emergency calls to report a fire or request an ambulance.The problem came less than two weeks before the telecommunication giant's mobile unit, SoftBank Corp, is scheduled to be listed on the Tokyo Stock Exchange in what could be the biggest-ever initial public offering in Japan.Users began experiencing problems with phone and data connections at 1:39 p.m., and the issues continued throu…READ FULL ARTICLE