Where can I buy a prepaid SIM card for a cellphone?

In Asia, most of the people are using SIM cards. A SIM card is a prepaid card that you use in your cellphone. After you're done with your minutes you need buy a load to get it working again. Is there anything like that here in the US? I'm tied with Verizon Wireless for 2 yrs. I have a Nokia cellphone that I... show more In Asia, most of the people are using SIM cards. A SIM card is a prepaid card that you use in your cellphone. After you're done with your minutes you need buy a load to get it working again. Is there anything like that here in the US? I'm tied with Verizon Wireless for 2 yrs. I have a Nokia cellphone that I bought in Asia. I'm thinking of letting my daughter use it but I don't want to sign for another 2-yr contract with Verizon. Will Go Phone work with this if there's no SIM card available around?
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