Hello Bfisher003,
Thanks for reaching out to Apple Support Communities. We've reviewed your question and it looks like you have questions about your SIM card after upgrading to a new iPhone. It's understandable that you'd want this resolved, so allow us to assist with that. The article that your question was linked from is very helpful when considering this issue, if you need to transfer your SIM contacts: Import contacts from your SIM card to your iPhone.
As far as if you need to switch your SIM or not, that would be up to your wireless carrier. Sometimes, the new iPhone comes with a new SIM, already programmed with the carrier and account details. Other times, you will be instructed to switch it from the old iPhone to the new one. We advise reaching out to your carrier to make sure what step you should take.
If you have follow-up questions, please let us know. We're here for you. Have a fantastic day!