Spice Stellar 520 - Processor and Connectivity options The Spice Stellar 520 is powered by a 1.3GHz quad-core processor, paired with 1GB of RAM, 4GB of on-board memory and a microSD card slot. Since the phone runs mostly on Android KitKat mobile OS, we havent found a single lag while navigating apps. Once again, in our brief testing, the device ran pretty smoothly without any major blunder. However, we wished the handset was more powerful to play heavy duty games. The new handset supports 2G and 3G connectivity, plus it does come with dual-SIM functionality. Furthermore, users also get Wi-Fi Tethering, Wi-Fi, GPS, APS, GMS, Bluetooth v3.0 and more.