Joe, a user, has purchased a new mobile device that uses a different OS than his previous one. Joe wants to copy his contacts and appointments from his corporate account without entering them manually. Which of the following would be the BEST way for a technician to assist Joe?
A. Log into the same email provider on the new device, and restore the contacts and dates.
B. Create a Bluetooth connection between Joe’s devices, and copy his contacts and calendar.
C. Back up the old mobile device to a PC, and import the contacts and schedule from the PC.
D. Use NFC to transfer all compatible data from one device to the other.

Joe should backup all his data from his old mobile device to his PC and then import all the data to his new device via PC. This is the fastest way for transferring data than all the other options mentioned. Most of the time the devices with different OS cannot connect via Bluetooth so option B is not suitable here. If we talk about logging in to same email provider on the new device, it might work but it'll take a lot of time to transfer data to a new device since the data is been copied through internet. If Joe has a strong internet connection than it might be a suitable option for him but what if the connections breaks down in middle of transfer? Similarly NFC also uses internet connection, but that's not only the problem with NFC, like Bluetooth, NFC also works with similar OS devices. Apart from that NFC only transfers small payloads of data.