I have galaxy core purchased 9 months ago. It is the slowest mobile from samsung. Just like all mobiles of samsung, this mobile also hangs up and slow. It has only a good camera. Thats it. Every now and then it will show some issue like motherboard gone, display blinking and battery problems.
Its a pathetic phone with pathetic after sale services. Advice u to go with Lg, Htc or gionee. Stay away from samsung.