How to find iOS version
how Can I get to the iOS version
Question marked as
If you mean that you'd like to know which iOS version is currently running on your iPhone, go to Settings>General>About and you'll find the answer.
Shouldn't this case, please better explain your needs:
1) What's your iPhone model?
2) What iOS version are you looking for?
3) What problems are you encountering?
This is a compatibility chart:
Thanks and regards
Giulio