Casio WSD-F20 Quick Start Manual page 5

STEP9
Next, follow the instructions displayed by the Android Wear app on your phone to complete the
pairing setup operation.
[Important!]
During the setup procedure, you will be prompted to perform a "Copy your Google Accounts to
your watch" operation.
Do not skip this step. You need to copy your Google account to you phone in order to update
apps and to install new apps using Play Store.
Next, configure the "Settings Required to Use CASIO Apps" on the Basic Operation Guide page.