The update promises to bring premium features to the mid-tier phones, including improved cameras with high-speed auto focus and noise reduction for better low-light photography.
The phones will be available in three new colours: Aurora Black, Moroccan Blue, and Terra Gold.
"LG's 2018 K Series range of smartphones is focused on delivering even more value to consumers looking for the right device that fits their lifestyle and needs," said Ha Jeung-uk, senior vice president and business unit leader for LG Electronics Mobile Communications Company.
Both models will roll out across Europe, Asia, Latin America and the Middle East this year.
Mobile World Congress 2018
reading•LG to unveil new K8 and K10 phones
Jun 1•All-screen, no-notch Vivo Nex phone officially lands June 12
Apr 11•21 hidden Galaxy S9 and S9 Plus features
Mar 29•CNET UK podcast 537: Huawei goes colourful and Andy secures his home
Mar 25•Web Foundation CEO: Getting the whole world online is our goal