Restore original bootloader G900F

[amar7]

Hello,
I once tried one of these auto rooter programs (forgot its name, it was a chinese program) and after realizing it kind of added many unwanted apps and not even succeeding with rooting the device, I reseted android, but there's still some change within the bootloader. Is there something like a reset for the bootloader too that I could use?
I want to have my device back as it was 100%.

 

[ironass]

Download and flash the stock Samsung firmware for your model of phone, CSC and Product code as per the instructions and video contained inthe links of #1.11 of 42 Galaxy S5 models - Dummies Guide