CID is not possible to be changed because it is programmed in the EEPROM of your phone and it is meant for the users not to mod their fones. Because they were leaks in the 1st batch of units as it it possible and easy to mod them out. Like newer models of K750i and W800i have CID49 in them. Lucky me I got 1 with a CID36 and Farmanager enters witout sweat...