download this rar and extract into your drive c:


http://www.gsmxpert.net/Android.rar








you should have Android folder in your c:




just open cmd and type cd c:\android


and press enter


connect your phone in fastboot mode and type




fastboot devices and press enter


if all is ok you will see a serial number eg ah4155425




then type this fastboot getvar cid to know your cid.