The Phone supports two GSM SIM at a time. If there is a call on one SIM then second SIM will be inactive during the call and vice versa. Capture Images & Record Videos of your Memorable Moments by your Karbonn K57 1.3 Mega Pixel camera and save them forever with you…! K57 has a big bright 6.1 cm Display. screen resolution is QVGA which has 320x240 pixels of resolution. Its bright screen enhances over all experience of yours. Enjoy quality music & feel the complete music experience on K57…..double your enjoyment with K57 big speaker & Loud sound. Stuff in as much data as possible in the memory card with Big 8 GB expandable Capacity. Set Mobile tracker on and enter the no. Of your friends or family. This will help you in case your phone is stolen. K57 will send an SMS automatically whenever the phone is lost.