Does an iPhone 3GS running iOS 6.1.6 require SIM card setup after iTunes restore?
For whatever reason, the SIM card slot decided to work about a day before I did the restore. I don't what did it or why it happened, but anyways it works. To answer my own question: No, nowhere in the setup for iOS 6.1.6 after the restore require a SIM card for activation, I'm not so sure about other iPhone models running other iOS versions, though.