Make sure Apple Watch and old iPhone are updated and synced to iCloud > back up old phone > set up new phone. When asked to use Apple Watch, select Continue > keep devices close > follow on-screen ...
Open the Watch app on your iPhone. Make sure you are on the My Watch tab, scroll down, and tap Sleep . Toggle on Charging ...
In this video you will learn how use Apple Pay on Apple Watch, and how to set up Apple Pay on iPhone and Apple Watch. First I will show you how to add a bank or debit card to Apple Wallet on iPhone.