The Galaxy Z Flip4 and Galaxy Z Fold4 are months away from launch but they will debut on the backs of two impressive devices. According to an analytics report, the Galaxy Z Flip3 and Galaxy Z Fold3 sold a combined 7.1 million units, or over 60% of global foldable shipments, in 2021.
https://www.notebookcheck.net/Impressive-Samsung-foldable-sales-pave-way-for-Galaxy-Z-Fold4-and-Galaxy-Z-Flip4-dominance.609104.0.html