Why can't I delete my google account off my phone?

Apr 29, 2017
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I have a LG VS890 4G, and I'm trying to delete a Google account I no longer want to use, and I can't, I can't find out why. I've been searching day and night, help!
 
Do a factory reset and upon setup input the new google account.
 
Do you really have to do a factory reset to delete it, can't you add another then disable the old one in accounts?