Turn the iPad face down so that the black plastic WiFi antenna cover is at the top. The SIM card tray is just below the upper right corner. Place a small paper clip into the hole beside it at a 45° angle and press until the tray pops out slightly. Remove the tray, insert the SIM card and replace the tray, pressing it in until it clicks into place.Got the replacement today & it doesn't have the latest iOS, I think I'll let that way for a while. LOL
They sent my old SIM in a separate envelope so now I'm trying to figure out how to install it in this iPad. Any helpful links?