iPhone Upgrade/Update from 12 to 12.1 beta

[BookEmDanno]

I have an iPhone6+ that is currently on 12. I would like to do some testing on the beta version (12.1). What is the correct way of upgrading/updating. Do I need iTunes to do so, or internally on the iphone device?
Also I'm assuming that I can always roll back if needed?

~Mahalo (Thanks)~!

 

[rogerandgina]

I have an iPhone6+ that is currently on 12. I would like to do some testing on the beta version (12.1). What is the correct way of upgrading/updating. Do I need iTunes to do so, or internally on the iphone device?
Also I'm assuming that I can always roll back if needed?

~Mahalo (Thanks)~!

Go here to get 12.1 https://beta.apple.com/sp/betaprogram/
I’m not sure if you can roll back.

 

[BookEmDanno]

Go here to get 12.1 https://beta.apple.com/sp/betaprogram/
I’m not sure if you can roll back.

Thank you for the response. When accessing that site, and logging in to my existing developer's account, and proceeding to the downloads section, it only lists the "Xcode" 10 and 10.1 download links. I searched both for macOS and iOS beta downloads but the search did not yield any links. Oh well, still searching at this point. Mahalo again.