Korean cell carrier SK Telecom said Thursday that it was contemplating making a bid for the struggling video chain Blockbuster. An official didn't explain the motivations, but it's suspected the deal would be an attempt to diversify away from its Korea-only network, where it leads but has a tough fight with KT and LG Telecom. Daewoo Securities analyst Byun Sung-jae told the WSJ that SK Telecom might feel oversaturated but could thrive in Internet video, where Blockbuster's content rights would be advantages.