There is not a sim card in the samsung gusto. Verizon Wireless only uses SIM cards for global or 4G phones. If you're referring to the memory card - on the side of the phone you would life the flap that says microSD, then lightly press in on the dark grey card and it will come out.
I have worked for Verizon for over 4 years. I am one of the few employees that is certified to troubleshoot all products and services we offer. I have both an android and an iphone, plus I am certified in Blackberry support.