The A399 supports Dual SIM (WCDMA+GSM) with dual standby and has 512 MB RAM. It also comes with 512 Mb of internal storage that is further expandable with up to 64GB of microSD card. The phone houses a 2-megapixel rear camera. It packs a 2500mAH Li-ion removable battery.
Other specifications include FM Radio, WiFi, Bluetooth, micro-USB v2.0, Mobile hotspot, GPS, A-GPS and 3G. It measures 140.7 x 72.6 x 9.9mm and weight is 147 gms only.