You work for a company that provides the same smartphone model for dozens of its employees. while troubleshooting one smartphone that won’t connect to the cellular network, you call the provider’s tech support number for some assistance. the technician asks for the device’s imei. What is she trying to determine? a. the os version on the phone b. the specific device you’re calling about c. the sim card installed in the device d. the ip address of the phone on the cellular provider’s data network