A leading celebrity lawyer has advised his clients not to use smartphones and the iCloud after intimate photos of Oscar-winning actress Jennifer Lawrence, Kate Upton and female entertainers and models were posted online following an apparent mass hacking. Martin Garbus, a New York trial lawyer who over the years has represented actors Al Pacino, Sean Connery, Robert Redford and others, said on Tuesday worried clients have approached him about security issues. Lawrence’s representative described the release of the photos as a “flagrant violation of privacy” and said the authorities have been contacted.