By Jeremy Wagstaff and Se Young Lee SINGAPORE/SEOUL (Reuters) - Efforts to revive its once stellar smartphone fortunes may be doomed if Samsung Electronics cannot overcome its dominant engineering culture, according to serving and former executives and those who have dealt with the company. "It's still 'we know how to sell boxes, we sell boxes'." Growth in handset sales is slowing as the smartphone market matures, and without its own distinctive software, content and services, Samsung has little to differentiate itself from other Android phone makers selling similar devices at lower prices. Samsung points to the launch of its mobile payments service, Samsung Pay, and its home control "internet of things" platform, SmartThings, as among the signs it has learned from its past.



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