By Se Young Lee SEOUL (Reuters) – Samsung Electronics Co Ltd is expected to report its second straight quarter of profit decline as its high-end smartphone business loses steam, a trend likely to sharpen the firms focus on costs and the cheaper phone market. The worlds biggest smartphone maker is counting on the fifth version of its flagship Galaxy S smartphone, which goes on sale globally from Friday, to right the ship and prove the technology giants staying power as a mobile innovator. But the Galaxy S5 has already got off to a weak start at home, with its South Korean debut marred by a temporary ban on mobile carriers selling handsets and criticism that it lacks eye-catching new features. Underscoring the challenges, Samsung priced the S5 about 10 percent cheaper than the S4 even though main rival Apple Inc is not widely expected to update its line-up until September.