Granting yourself the rooting rights over the Android operating system that is running on the Samsung Galaxy Note 12.2 tablet is making you the root user which is referring to getting access to the root user account. The root user account is naturally there on the Linux kernel, but it is taken away by Android developers to bolster security which has turned it into one of the most secure operating systems in the world.
The Android operating system always remains secure regardless if you are rooted or unrooted provided you take a minute and check what permissions the app you want to install is requesting. Some apps want permissions to look in your contacts, and some will request permissions to your messaging apps. Once you grant an application permission to do these things then they are then able to roam in those areas, so always read the permissions requested before downloading.
Once you have rooted the Samsung Galaxy Note 12.2 SM-P901 tablet running on the Android 5.0.2 Lollipop software updates, you can install any apps that you want. That includes all of the apps that would not run before because they needed root access to the system. One of those applications you can check out is the Trickster  application. Trickster is developed to give you control of overclocking. By overclocking the hardware on your tablet, you can increase the performance above what Samsung chose to have as the default setting. Trickster allows you to change the frequencies of the CPU and the GPU which is great if you are suffering from lag in the operating system. Just make sure you are an advanced Android user before using a powerful app like Trickster because overclocking too much can cause damage and fry the hardware. You need to have the knowledge of what is the limits of the hardware installed in the Samsung Galaxy Note 12.2 before you can play with apps of this nature.
- You need the Samsung Galaxy Note 12.2 tablet that has the SM-P901 model number if you are using the rooting file found in this guide. The CF-Auto-Root tool comes for different model numbers and flashing the wrong one can mean bricking. You can find out the model number of the Samsung Galaxy Note 12.2 in your hands by tapping on the Menu > Settings > About Device > Model Number.
- You must have a computer that runs Microsoft’s Windows before you can flash the CF-Auto-Root tool that is going to root your device because the Odin flashing tool only runs on Windows.
BEFORE WE BEGIN
- Chainfire had the LRX22G.P901UBU0BOI2 firmware build number running on the Samsung Galaxy Note 12.2 SM-P901 tablet when he creating the rooting method that is available in this guide. You don’t have to be running on the same firmware version as him. All you have to do is make sure that you have the Samsung Galaxy Note 12.2 tablet that comes with the SM-P901 model number and that it is running on the Android 5.0.2 Lollipop software updates.
- Unlock the Developer Options menu on the Samsung Galaxy Note 12.2 SM-P901 if you are using a device that doesn’t have the Developer Options unlocked already. You find it by tapping on the Menu > Settings > About Device > Build Number and tap on the build number at least seven times. You know you have tapped enough times when it gives a message stating that you are using the device as a developer.
- Turn on the USB Debugging Mode from the Developer Options menu on the Galaxy Note 12.2 by tapping on the Menu > Settings > Developer Options > USB Debugging.
- Some Android software updates can have new bootloaders that stop the CF-Auto-Root tool from working temporarily until the developer updates them again to work. Before he can do that, he relies on readers finding the problems and submitting the new recovery image found in the firmware creating the problems to the CF-Auto-Root tool thread made at the XDA-Developers website . You know that a new bootloader is likely present if you flash the CF-Auto-Root package using Odin and then your device is not booting up.
- Install the Samsung USB Drivers on the Windows computer  before getting started with the guide so that the Samsung Galaxy Note 12.2 tablet can connect to the Odin flashing tool which will then allow for the flashing.
HOW TO ROOT SAMSUNG GALAXY NOTE 12.2 SM-P901 RUNNING ON ANDROID 5.0.2 LOLLIPOP SOFTWARE UPDATES
- Download the CF-Auto-Root  package for the Samsung Galaxy Note 12.2 SM-P901 running on Android 5.0.2 Lollipop software updates.
- Open the Downloads folder on the Windows PC to find the file you just downloaded and then extract the file to the Downloads folder.
- Double-click on the Odin flashing app from the Downloads folder and the flashing tool you are about to use opens.
- Boot the Samsung Galaxy Note 12.2 SM-P901 into the download mode (Start with it off and then boot it holding the Power + Home + Volume Down buttons), and then connect it to the computer with the USB cable.
- Check that Odin is showing a yellow or blue color from the ID: COM port now which is there to let you know that the Samsung USB Drivers you installed earlier are running, and everything is working.
- Click on the AP button from the Odin app on the computer and then click through to the Downloads folder and choose to upload the MD5 file to Odin.
- Click on the Start button from Odin without changing any of the default settings and the rooting begins.
- You know thew rooting is complete when doing shows a green box with a pass message inside it.
In conclusion, that is how to root Samsung Galaxy Note 12.2 SM-P901 running on the Android 5.0.2 Lollipop software updates. The guide makes use of Chainfire’s CF-Auto-Root tool that just flashed SuperSU so that it is not only installed but also enabled. You can now open the Google Play Store application and start installing the root applications that would not run before you followed the guide above—names like Titanium backup, Xposed, Viper4Android, and ROM Manager are only a few clicks away.