The Ulefone S1 was announced in 2018, August With 5.5 inches, 78.1 cm2 (~74.3% screen-to-body ratio) IPS LCD, Powered by Mediatek MT6580 (28nm) and running Android 8.1 Oreo (Go edition), the device delivered smooth performance and multitasking capabilities. while the Li-Po 3000 mAh, non-removable ensured long-lasting usage.