Installing Official Oreo 8.0 in Samsung Galaxy S7/S7 Edge

Samsung is delaying the release of Oreo 8.0 for Galaxy S7 and S7 Edge phones but some countries had tasted the flavor of Oreo 8.0.
So we are gonna try the Oreo 8.0 in our phones by flashing other countries' firmware. 
This is completely official ROM from Samsung and the features such as Samsung Pay, Knox, etc. works.

Make sure to follow the below steps carefully.

1. Backup all your data since it completely wipes out the data in the phone. Make sure the phone is charged over 60%

2. The models ending with D such as G930FD or G935FD are Indian variants which does not have Oreo yet. Go to the site https://www.sammobile.com/firmwares/ and search for your variant, say SM-G930F for S7 and SM-935F for S7 Edge. 

3. Select a country's firmware which has Oreo 8.0 (Say United Kingdom) and download the firmware file.

4. Download the latest ODIN from http://odindownload.com/

5. Extract or Unzip the firmware file into a folder. Avoid using winrar as it can cause errors. Use 7zip instead. The extracted files are shown in the below screenshot.

6. Run/Open ODIN as Administrator

7. Put the phone in download mode. Shutdown your phone. Press Power + Home + Volume down. A screen appears asking you whether to continue or not. Press Volume up to continue. Connect the phone to the computer via a good USB cable. The ODIN should show the it has detected your phone.

8. From the extracted firmware put the below files in ODIN. Click on the buttons BL, AP, CP,  CSC one by one and choose the respective files. The file to be chosen for BL will start with file name BL. The file to go for AP will start with the file name AP and so on as shown in the following image. 

Note: Select CSC instead of Home CSC

      BL
      AP
      CP
      CSC

9. Check the below options. (for this select Options tab).

F.reset time
Auto reboot

10. Check the below option as shown in the following image.

Re-partition

11.   Now click the Start button and wait until the ODIN shows PASS. The phone will now reboot.

12.   To receive OTA updates, after installing the firmware, put the phone into Recovery Mode and wipe cache then wipe data/factory reset.

To go to the recovery mode press Power + Home + Volume up button. Now select ‘Cache Partition’ and wipe it. Then ‘wipe data/factory reset’ and reboot your phone. 

You are done.