SM-G930P S7 Flash with different firmware

Hello, I'm new in the forum and ager to learn from all of you guys!!

I recently rooted my S7 SM-G930P using XDA method, I would like to use an international firmware in my phone and the questions are:

Which firmware should I use? SM-G930F??
Will the phone needs to be unlocked again if I reload the FW?

Thanks in advance!!!
Montz_One