How to sync my phone

Hi

To set up and sync Apple Watch with your iPhone (an iPhone 5 or later is required), follow the instructions here:

Set up your Apple Watch - Apple Support

To sync your iPhone with iTunes on a computer, follow the instructions here:

Sync your iPhone, iPad, or iPod touch with iTunes on your computer using USB - Apple Support

To back up your iPhone via iTunes or iCloud, follow the steps here:

How to back up your iPhone, iPad, and iPod touch - Apple Support