Hi all, Android newbie here. I just purchased a used Nexus 7 (2013, 32 GB) on eBay. This is my first tablet, and my first Android device. But I'm comfortable with computers and tech in general, so I'm not afraid to dig in and get my hands dirty. A friend of mine (who has much more experience with Android devices than I do) suggested that, since I'm buying this tablet used, I should do a full factory reset, and verify that the firmware on the tablet is stock. Do you experts agree with this advice? Are there how-to's on this forum describing how to perform this process? Do you suggest I do anything else? Thanks!