#1 addedOne more thing that i want to mention is if u have latest stock rom with "ASKS Security"....before doing any root method,pls downgrade ur rom first.
How to know if u have "ASKS Security" installed ?
-Go to Settings > About Phone > Find "ASKS Security Version"
If dont have it then u are on the old version of stock rom and can do any root method without any problem.
it is because if u do that u will get stuck on Logo when u boot for example "Galaxy V Plus" because i have sm-g318hz device.
i have experience this problem when i try flashing prerooted rom when i have "ASKS Security" installed on my sm-g318hz.