If I downloaded iOS 17 beta, will I be able to download the real iOS 17?

Yes. You will.

Keep in mind that beta software is inherently unstable and you’re extremely likely to run into compatibility problems with lots of apps, especially things like banking apps, that will need to be updated to recognize the new version of ios. That usually doesn’t happen until immediately prior to the full release.

you should NEVER install beta software on a device you rely on for daily use. It is intended for testing.

This is not the right forum to discuss beta

Frankly, if you have to ask, you should not be using the beta.

SravanKrA wrote:

This is not the right forum to discuss beta

The hosts have generally permitted this type of question.