In its full earnings report for Q4 2018, the Korean conglomerate has revealed that it posted 59.27 trillion Korean won (US$53.4 billion) in quarterly revenue, down 10 percent from the same time last year. Its 10.8 trillion Korean won (US$9.7 billion) quarterly operating profit is also down 29 percent from the same period in 2017.

Samsung said its memory business (NAND and DRAM) suffered from "macroeconomic uncertainties and adjustments in inventory levels" by customers that include data center companies and smartphone makers. The division was likely affected by the slowing global smartphone sales, which also made a strong impact on Apple's earnings for October to December last year. In fact, the company expects slow smartphone sales to affect its mobile display business in the first quarter of 2019, as well.

The mobile division itself suffered a profit decline quarter-on-quarter due to the sluggish market, and Samsung doesn't believe that'll change anytime soon. It says the demand for smartphones and tablets is projected to drop even further for Q1 2019 due to seasonal slowdown, though it's hoping that the Galaxy S10, slated to be unveiled next month, and its other upcoming flagships can prop up sales in the coming months.

The tech giant believes the issues that brought about a sharp decline in the fourth quarter of 2018 will persist, and it warned of worse earnings for 2019 due to the weaker demand for memory. That said, its poor performance for Q4 2018 didn't affect its numbers for the whole fiscal year: it posted 243.77 trillion won (US$220 billion) in revenue and 58.89 trillion won (US$53 billion) in operating profit for the whole of 2018, making it the second year in a row that the company was able to set record financial results.