You can sync contacts, calendars, and other information from your social networks, email accounts, and online services on
Depending on the account type, signing in to your online accounts lets you sync updates between
HTC Butterfly and the Web.
Go to Settings, and then tap
Accounts & sync.
Tap the account type you want to add.
Follow the onscreen instructions to enter your account information.
, tap the
On/Off switch to turn automatic sync of all your accounts.