Vivo Y31 S has display Size 6.58", operating system Android 11, Funtouch 10.5. The device has ram 4/6 GB too, card support is No, it has 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM hard disk. Back camera 13 MP is awesome, front camera 8 MP is also not bad. Y31 S has power storage, . Device status is Available