The leaked image features 5G branding and a triple-lens rear camera system.
The V50 ThinQ is expected to be offered through Sprint, the fourth-largest mobile network in the US.
Sprint has said that its first 5G smartphone will be made by LG and will be available in the first of half of 2019.
LG previously announced that its upcoming 5G smartphone will offer a Qualcomm Snapdragon 855 chip, as well as a powerful vapor chamber cooling system.
The smartphone will also include a 4,000mAh battery - a 20% increase over the LG V40 ThinQ smartphone.
The leaked image of LG V50 ThinQ is below.