On my s3 mini the sd card is under the battery so you cant take out the sd card without taking out the battery first, thats why I couldnt see the point of the unmount procedure, because no matter what, the phone is gonna be powerless when you take the sd card out.
I just wasnt sure if I should unmount every time I wanna take it out then power off and remove battery and sd card...... or I can just turn the phone off as per usual then remove the battery and sd card.
Thanks!!!