# Address book
Tap the Contacts button at the bottom of the application window.
# User statuses
Every user in the address book will be displayed with one of the following statuses:
— online
— recently active: a status for the users who were previously logged in using their mobile app but are currently offline
— the owner of an ongoing conference
— busy (currently participates in a video call or conference)
— offline
— unknown (e.g., an account does not exist or is created on an external server which is not federated with your server instance. This status may also be assigned to an existing user on the same server which has not been yet added to the address book.)# Quick preview
Tap and hold on a contact icon in the address book to open the quick preview window. Here, you can call the selected contact, send a message or block the user. Click on the profile avatar to view detailed information about the contact.
# User profile
If you want to visit a user profile, choose it in the address book and tap the 
button. In the user profile you can do the following actions:
Call the user or start a chat
View the user's name, TrueConf ID and status
View the call history with this user.
# How to find a contact
To find a contact, enter their TrueConf ID or username in the search box.
# How to add a new contact
To add a user to the address book, find the contact as described above and press the 
button.
Please note that you don’t have to add users manually. Instead, your TrueConf Server administrator can organize your address book and set up user group display automatically.
# How to block or delete a contact
If you want to prevent a user from calling and sending messages to you, proceed to the user profile and tap Ban.
To quickly remove a user from the address book, just swipe left the user's name in the address book.
Alternatively, you can go to the user profile and tap the Delete button.
# Call history
To view the call history, activate this switcher:
You can also use a call filter with the following parameters:
History — all calls
Missed — missed and rejected calls
In — incoming calls
Out — outgoing calls.
The call history with a specific user is available in the user profile.
# Organizing address book
# Address book display
To enable user group display in the address book, you need to enable the Show Groups option in the Options → General section.
# Adding user groups
To create a group, proceed to Options → General → Manage → New, enter the group's name and tap the Create button.
# Editing or deleting groups
To delete or edit a group:
Go to the list of groups in the address book (if they are not visible, enable the group display).
Find your group, tap the
button opposite its name and choose Edit Group or Delete Group in the pop-up menu.
# Global user list
Open your address book and tap the 
button to view the users of other TrueConf Server instances federated with your server.
This menu item may be missing if integration is not set up on your TrueConf Server instanceTrueConf Directory.