You can check Samsung device firmare with CheckFirm.

1. Search
Just input model and CSC. CheckFirm will search official and test firmware for you.

2. Bookmark
Add your device to bookmark. You can search it on main screen and search screen with one touch. You can also backup and restore your bookmarks!

3. Theme
You can choose light and dark theme. Latest One UI theme is embedded too.

4. Help
Are you a newbie to CheckFirm? I prepared information for you. You can see it on CheckFirm settings - Help.

5. Welcome Search
Whenever you open CheckFirm, it will search firmware automatically. You can enroll up to 4 devices.

6. Info Catcher
You can even get notification whenever new test firmware is found.

7. Sherlock & Watson
Samsung encrypted firmware. Now it's time to guess the real firmware. You can use Sherlock to decrypt firmware information! Use Sherlock, and be Watson.

8. Inquiry
Did you find a bug? Are you curious about the app? Do you have an amazing idea? You can contact with CheckFirm developer. My eyes and ears are always open for you guys.