LG today warned that its mobile division swung hard towards a loss in the spring owing to its weakness in smartphones. It plunged from a roughly $620 million profit a year ago to a $101 million loss owing primarily to a lack of smartphones. The company shipped slightly more phones between April and June, 30.6 million, but it tacitly acknowledged that its focus on low-cost devices saw it in a declining market and with far lower profit margins.