This question already has an answer here:
I was given 2 used 7" RCA model RCT6873W42 Android tablets. The batterys on both tablets are charged up and the tablets turn on. The last owner didn't do the "wipe data/factory reset" in the right order. They didn't remove the last Gmail account that the tablets were sync to before doing the factory reset. And I keep running into a roadblock on both tablets when I get to the point in the set up were it asks for my Google email address. See the screen capture. I did the "wipe data/factory reset" 2 times. No change. I don't know how to bypass the "Factory Reset Protection" and I can't get the last owner's email address and password in order to open up the tablets. Is there a way to around the "Factory Reset Protection"?
Update I now have what the eBay seller calls an "OEM MICRO USB male to female USB OTG Host Adapter For a RCA Voyager RCT6873W42 Tablet". I must be doing something wrong in trying to get the tablet to see the prog "Bypass any Samsung Google Account Lock.apk" or I am using the wrong APK prog.
Also I have found that I have full access via a back door to all non rooted files and directory's in the tablet via the USB cable when connected to my Windows laptop. What I can do with that back door, I don't know. But I can read and write to the tablets. I also have ADB/Fastload for windows. I have used ADB/Fastload to root a cell phone and a tablet before. But that cell phone and tablet didn't have FRP installed in them. They were older OS's.