A new device from LG with model number LG LS620, which has received Wi-Fi Alliance certification, was spotted again in an User Agent Profile on Sprint official website.
The LG LS620 is a mid-range android smart phone with Android 4.4 kitkat OS, According to Specs revealed in the UA Profile.
The LG LS620 features a touch screen display of unknown size with 480×800 pixel resolution and runs on Android 4.4 kitkiat OS. Other specs revealed in UA Profile includes: ARM CPU, 4G LTE network connectivity, 1GB of RAM, 4GB of ROM, 32GB external SD slot, a 5MP Rear Camera and a 0.3MP Front Camera.
Maybe the UA Profile of the LG LS620 is the Draft version, Sprint might revise the UA Profile listing later.
Source: LG LS620 UA profile