Acer Liquid M220 has display Size 4.0", operating system Microsoft Windows Phone 8.1. The device has ram 1 GB too, card support is microSD, up to 32 GB (dedicated slot), it has 4 GB, 512 MB RAM - Liquid M2208 GB, 1 GB RAM - Liquid M220 Plus hard disk. Back camera 5 MP is awesome, front camera 2 MP is also not bad. Liquid M220 has power storage, Up to 4 h. Device status is Available