How do I troubleshoot a phone that is not syncing with my computer?

Make sure that the phone is compatible with the computer.
Before attempting any troubleshooting steps, confirm that the device is compatible with the computer using the manufacturer’s website.
Check that the cables are properly connected.
Confirm that the device is securely connected with the correct cable for the device.
Restart the phone and computer.
Turning the devices off and then back on can fix many minor connection issues.
Update device drivers.
Use the manufacturer’s website to download the most recent version of the drivers for the device.
Reset the device settings.
Check the device manual for instructions on resetting settings if applicable.