LG G3 User Manual page 101

To remove a friend from the blocked list, from the chatting list, tap the
Options icon
people, then tap Unblock next to the contact you want to unblock.
Changing Hangouts Settings
From the chatting list, tap the Options icon
the screen) > Settings.
Enable merged conversations: Enable this setting to merge your
contact conversations from both SMS and Hangouts together.
Tap SMS to access the following settings: SMS enabled (or disabled),
Default SMS Messaging Account, Blocked people, Sound, Vibrate,
Delete old messages, Delivery reports, Auto retrieve MMS, and
Roaming auto-retrieve.
Tap your account to access the following settings: Profile photo, Share
your status, Hangouts messages & invites, Video calls, Customize
invites, Google+ profile, Verified phone number (or Verify phone
number), Hidden contacts, Sign out, and Improve Hangouts.
(at the upper-right corner of the screen), tap Blocked
Communication
(at the upper-left corner of
99