Can I activate three 3GS iPhones if i set them all back to factory settings using iTunes? I was wondering if I have 3 3GS iPhones and they are all locked and I set them back to factory settings using iTunes, if I could activate them and just activate using one SIM card and then use them just with WiFi with out the SIM card?
Yes, as you said yourself you need a simcard to activate them. But afterwards you can use them "just Wi-Fi" without any problem. Sorry I can't write any longer answer, this is just as it is.