Team Win’s custom recovery is now so widespread that when we say we are going to be installing a custom recovery on a new smartphone, it is just about a given that we are referring to TWRP Recovery. Anyone looking it gets root access on Android, flash a custom ROM and kernel, or use a more feature-rich recovery that what comes stock should consider installing a custom recovery.
While one-click rooting tools are always quick and easy, most people prefer getting root access from flashing SuperSU from a custom recovery like TWRP. The TWRP Recovery also comes with more features than other recovery images, making flashing more enjoyable.
- You must have the Samsung Galaxy A9 Pro smartphone to flash the custom recovery image that is available in this guide.
- You need to have a computer that is running in the Microsoft Windows environment before you can use this guide. The flashing is done with the Odin flashing tool and it only runs on Windows.
BEFORE WE BEGIN
- You need to unlock the Developer Options menu  on the Samsung Galaxy A9 Pro smartphone and turn on the USB Debugging Mode  before you can use this guide. The USB Debugging Mode being enabled is what allows us to make changes to the Android software and is commonly used by developers hence the option available from the Developer options menu.
- Make sure you install the Samsung USB Drivers  on the computer so when you do connect the Samsung Galaxy A9 Pro smartphone to the computer with the USB cable that the Odin flashing tool can detect your smartphone and allow for the flashing.
HOW TO INSTALL TWRP RECOVERY ON SAMSUNG GALAXY A9 PRO
- Download the TWRP Recovery  for the Samsung Galaxy A9 Pro directly to the Windows computer.
- Download the latest version of the Odin flashing tool  to the computer.
- Extract both files to the desktop of the computer.
- Double-click on the Odin flashing tool executable file that is on the desktop and the flashing tool opens.
- Boot the Samsung Galaxy A9 Pro smartphone into the download mode  and connect it to the computer with the USB cable that is used for charging the battery.
- Check that Odin shows a blue or yellow color coming from the ID: COM port that is available on the Odin user interface. (No color coming from the ID: COM port suggests that the Samsung USB Drivers are not yet installed correctly).
- Do not make changes to the default options that are already showing from Odin and its boxes.
- Click the AP button and browse through on the desktop and select the rooting MD5 file to upload to Odin.
- Click on the Start button and the rooting begins.
- Wait until Odin shows a green box that has a pass message inside it before unplugging from the computer and enjoying the new rooted phone.
In conclusion, that is how to install TWRP Recovery on Samsung Galaxy A9 Pro smartphones using the Odin flashing tool from a Windows computer. You can boot into the Galaxy A9 Pro’s Recovery Mode by holding down the same hardware button combination that is available for the stock recovery, and the new custom recovery boots up instead. You can only ever have one of the two (custom or stock) recoveries running at the one time, and both are always accessed using the same buttons.
Now that you understand everything about getting the smartphone into the Recovery Mode, it’s time to check out what is required to root the Samsung Galaxy A9 Pro smartphone running on Android 6.0.1 Marshmallow  software updates.