LG Electronics swung to a loss in the fourth quarter, but saw signs of life flicker a little brighter in its smartphone business. The Korean conglomerate posted a loss of 64 billion Korean won, or $59.1 million, reversing a year-ago profit of 223 Korean won, or $205.8 million. LG blamed an unfavorable shift in the foreign currency exchange rate the year-over-year downturn.