How do I clear off all the information on a lg dare 9700 phone?

I just bought it used and it still has persons info on it and I want to clear it all off.How do I clear off all the information on a lg dare 9700 phone?
i have this phone. go to settings and tools. phone settings. security. the code should be the last 4 digits of your phone number. restore phone. then hit ok and you should be good. hope this helped!How do I clear off all the information on a lg dare 9700 phone?
I wish i had that phone!!!

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