Samsung Electronics Co Ltd expects record shipments for its new Galaxy S6 smartphones and said it will struggle to meet demand for the curved-edged version due to production constraints, adding to hopes for a turnaround in mobile sales. This week, the company estimated its January-March operating profit to be its highest in three quarters, which analysts said was partly because Samsung put its own chips in the new phones. Samsung expects the flat screen S6 to sell more than the higher-margin S6 edge – priced about $120 more in South Korea – but mobile chief J.K.