Note
Follow the instructions on how to flash the device carefully from the link above
I will not take responsibility on whatever may happen to your device.
To flash or upgrade this device, you will have to use odin
Follow the procedures below
Put your device into download mode by holding volume down + home + power button
Connect device to PC
Download the latest version of odin from here
Download and extract the firmware of the device you want to flash or upgrade
Launch Odin
Click on AP button then navigate to the folder containing the firmware and select the file
After odin has analyzed the file, Click start button and wait for process to complete
For a more detail guide on how to use odin (pics and video), click here
Samsung Galaxy N5100 stock firmware
Arabic
Android 4.4.2
N5100XXDNH3_OJVDNH3
N5100XXDNK3_OJVDNK1
Brazil
Android 4.4.2
N5100UBDNK2_ZTODNK2
France
Android 4.4.2
N5100XXDNH2_OXXDNH2_XEF
Poland
Android 4.4.4
N5100XXDNL5_OXADNL5_XEO
South East Asia
Android 4.4.2
N5100XXDNJ2_OLBDNJ2
******************************************************************************
Samsung Galaxy N5105 Stock Firmware
TURKEY
N5105JVCMI2_N5105TURCMI3_TUR