To program a , you need the MOTOTRBO Customer Programming Software (CPS) . While this software is generally free from Motorola, it requires an official business account to download securely. How to Get the Official Motorola XiR P8668 Software
If the software won't "Read" the radio, check your cable connection and ensure the radio is turned on. Check Windows Device Manager to see if the driver is correctly installed. Motorola Xir P8668 Programming Software Download
You cannot use a standard micro-USB cable. The P8668 requires a high-quality USB programming cable that includes a level shifter chip (often FTDI-based). Cheap eBay cables cause “Device not recognized” errors 80% of the time. Motorola XiR P8668 To program a , you