LG D959 - Manual (Page 51)

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After signing in, your phone will sync with your Google services, such as Gmail,
Contacts, Calendar, and Google+ photo albums. You can also use Maps,
download applications from Play Store, back up your settings to Google servers,
and take advantage of other Google services on your phone.
IMPORTANT
• Some applications, such as Calendar, work only with the first Google Account
you add. If you plan to use more than one Google Account with your phone,
be sure to sign into the one you want to use with such applications first.
When you sign in, your contacts, Gmail messages, Calendar events, and other
information from these applications and services on the web are synchronized
with your phone. If you don’t sign into a Google Account during setup, you
will be prompted to sign in or to create a Google Account the first time you
start an application that requires one, such as Gmail or Play Store.
• If you have an enterprise account through your company or other
organization, your IT department may have special instructions on how to
sign into that account.
Google account setup