Download Android KitKat 4.4.2 stock firmware for Samsung SM-G3608 Galaxy Core Prime smartphone from here or from here.
Archive name: samsung_G3608_4.4.2_0_21_20150701_wg
Archive file size: 1.00 GB
Model: Samsung SM-G3608 Galaxy Core Prime smartphone
Platform: Qualcomm MSM8916 Snapdragon 410
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.