Help Please help me ASAP

[PleaseHelpMePlz]

I tried to get navigation keys on my S3 and i didnt like the way it looked so i deleted the Build.prop file and now when i boot my phone up it gets stuck on the Samsung screen the problem is my Home key doesnt work idk what to do please help

 

[AP2FTW]

well hopefully you have twrp and made a backup...if so you should be able to boot into recovery and restore your backup...if not, you're going to have to use odin and install the stock firmware

 

[El Presidente]

The build.prop is a pretty essential system file.

Can you get back in to recovery to restore the backup you took before you started messing around? Do you need your home key for that?

Failing that, you'd need to reflash your OS using odin, but you'd need to be able to get to download mode for that, which afaik, isn't possible without a home key.