Don't Root If You're Unprepared
Do not, we repeat, do not jump into the rooting process until you've prepared for the rooting process. This is a multi-part process.
First, you must assess how comfortable you feel with the rooting process itself. There's a ton of jargon in the instructions and it's important that you know what everything means before you start.
If the instructions are way over your head, you'll need to invest some time learning about the nuances of rooting your device.
If it still seems complicated after you put in some research, you're probably better off sticking it out on stock Nougat.
You'll also want to make sure everything important on your device is backed up. Galaxy S7 and Galaxy S7 Edge users have successfully rooted their devices using this method but that doesn't mean you and your devices will come out unscathed.
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