Engineering Bootloader G920F - Downgrade 5.1.1 to 5.0.2

as i said in the title,

i know that there is this engineering bootloader that keep safe the knox status if you want to mod the phone.
my question is simple, if i install this particular bootloader, i'll have root and custom recovery, is it possible to install a rom/custom rom/ stock firmware with the 5.0.2?

thanks.

engineering bootloader for 5.1.1 or 5.0.2

Hello,

Where can I find the engineering bootloader for 5.1.1 and/or 5.0.2 for G925F?

Thank you.

Reverse engineering an app in Apk Studio.

I'm trying to add an option in an app called aizoban that you could find on fdroid. It's a manga app. What I'm trying to do is add the website goodmanga.net to the app in the settings. How do i add a website's address and link to the manga source options?

Reverse Engineering question.

Hello guys.

I friend of mine is challenging me to hack his application but I ve a little problem. I think it should be easy to do for you guys but I m noob and I need more informations.

In the application when I click a button a Webview is opened and a link is loaded. In this link I should put some informations. If the informations are correct the website loaded in the webview (or the server in which is hosted) comunicates to the applications that the informations are correct and the application unlock some cool functions I can use. My task is to find where the application retrieve these informations from the webview in order to change the verification method orin order to find where the application unlock the cool functions (but I m sure that if I find where the application is getting data from the webview I can find the rest). The problem is that I can't find nothing that is comunicating with the webview.

Can you suggest me if there is some functions or classes that are able to comunicate with webview or website?? Or if there is a fast way to find the function used ??