The "unlocked" smartphone market has been growing rapidly across the United States in recent years. However, coupled with the adjustment of unlocked iPhone program by Apple and extended smartphone replacement cycle, as we expected, US unlocked smartphones market keep posting an annual decline (-9% YoY) in Q2 2019. BLU maintained the top position this quarter, followed by Samsung, Lenovo-Motorola, Google, LG, TCL-Alcatel and Apple in US unlocked smartphone market during Q2 2019. Our extensive report contains quarterly unlocked smartphone shipments and marketshare for the top 18 vendors in the United States from 2013 through Q2 2019. The report also contains US unlocked smartphone forecasts, as well as unlocked iPhone forecasts from 2012 through 2024. This report is a valuable tool for mobile stakeholders who want to size the fast-growing, high-value unlocked smartphone market in US.