RomKingz: Download Samsung Galaxy A3 SM-A300H Stock Firmware

Flash/unbrick or upgrade your device with the firmwares below using odin

Learn how to use odin from here

SAMSUNG GALAXY SM-A300H STOCK FIRMWARE

- Download and install samsung drivers

- Download and launch odin

- Turn off your phone

- Boot phone into download mode by holding vol down + home + power button

- When you see the yellow triangle, press volume up to continue into odin mode

- Now connect the phone to PC using USB cord

- Wait for odin to detect the phone (you will see the COM Port)

- Now click AP in odin interface then select the firmware

- After the firmware is successfully loaded,

- Click Start button

- Wait for process to complete

- When you see PASS in green then the process is complete.

- Wait for the device to reboot

Its always good to do a factory reset after doing this process

For a more detail process on how to flash or upgrade Samsung devices, click here

For other Samsung firmwares, click here

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