Apple has made several changes to the CDMA iPhone 4 that Verizon Wireless will launch on its network Thursday. These include a new antenna and a new CDMA/GSM baseband processor. The changes make for an improved iPhone 4 and pave the way for Apple to produce future versions of the device more economically, according to tech specialists who tore down the CDMA iPhone 4. Neither Apple nor Verizon responded to requests for comment by press time. Apple made changes to the antenna for the CDMA iPhone 4.