The "K series" refers to a line of smartphones developed by LG Electronics. Known for their affordability and user-friendly features, these devices typically offer a good balance of performance and functionality. The K series is designed to cater to budget-conscious consumers while still providing essential smartphone capabilities. Each model in the K series often includes a decent camera, a vibrant display, and a long-lasting battery. The series has seen various iterations, with improvements in design and technology over time, making it a popular choice for those seeking reliable smartphones without high costs.