diff --git a/man/signal-cli-dbus.5.adoc b/man/signal-cli-dbus.5.adoc
index b9279416..76b9f541 100755
--- a/man/signal-cli-dbus.5.adoc
+++ b/man/signal-cli-dbus.5.adoc
@@ -195,6 +195,24 @@ Depending on the type of the recipient(s) field this deletes a message with one
 
 Exceptions: Failure, InvalidNumber
 
+sendContacts() -> <>
+
+Sends a synchronization message with the local contacts list to all linked devices.
+
+Exceptions: Failure, UntrustedIdentity
+
+sendSyncRequest() -> <>
+
+Sends a synchronization request to the primary device (for group, contacts, ...). Only works if a secondary device is running the daemon.
+
+Exception: Failure
+
+trust(number<s>, safetyNumber<s>) -> <>::
+* number       : Phone number
+* safetyNumber : Verify the safety number associated with the phone number. 
+
+Exceptions: Failure, InvalidNumber;
+
 sendTyping(typingAction<b>, base64GroupId<s>, recipients<as>) -> <>
 * typingAction  : true = start typing, false = stop typing
 * base64GroupId : String representing the internal group identifier in Base64 format
diff --git a/src/main/java/org/asamk/Signal.java b/src/main/java/org/asamk/Signal.java
index 7a5aaea1..3f20648e 100644
--- a/src/main/java/org/asamk/Signal.java
+++ b/src/main/java/org/asamk/Signal.java
@@ -1,6 +1,7 @@
 package org.asamk;
 
 import org.asamk.SignalControl;
+import org.asamk.Signal.Error;
 import org.asamk.signal.commands.exceptions.IOErrorException;
 import org.asamk.signal.commands.exceptions.UnexpectedErrorException;
 import org.asamk.signal.commands.exceptions.UserErrorException;
@@ -79,6 +80,12 @@ public interface Signal extends DBusInterface {
             String emoji, boolean remove, String targetAuthor, long targetSentTimestamp, byte[] groupId
     ) throws Error.GroupNotFound, Error.Failure, Error.InvalidNumber;
 
+    void sendContacts() throws Error.Failure, Error.UntrustedIdentity;
+
+    void sendSyncRequest() throws Error.Failure;
+
+    void trust(String number, String safetyNumber) throws Error.Failure, Error.InvalidNumber;
+
     void sendTyping(boolean typingAction, String base64GroupId, List<String>recipients) throws Error.Failure, Error.UntrustedIdentity;
 
     String getContactName(String number) throws Error.InvalidNumber;
@@ -151,10 +158,10 @@ public interface Signal extends DBusInterface {
     void updateProfile(
             String name, String about, String aboutEmoji, String avatarPath, boolean removeAvatar
     ) throws Error.Failure;
- 
-    void removePin() throws Error.Failure; 
 
-    void setPin(String registrationLockPin) throws Error.Failure; 
+    void removePin() throws Error.Failure;
+
+    void setPin(String registrationLockPin) throws Error.Failure;
 
     String version();
 
diff --git a/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java b/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java
index 9c88e266..177ffcc6 100644
--- a/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java
+++ b/src/main/java/org/asamk/signal/dbus/DbusSignalImpl.java
@@ -13,6 +13,7 @@ import org.asamk.signal.OutputWriter;
 import org.asamk.signal.commands.exceptions.CommandException;
 import org.asamk.signal.commands.exceptions.IOErrorException;
 import org.asamk.signal.commands.exceptions.UnexpectedErrorException;
+import org.asamk.signal.commands.exceptions.UntrustedKeyErrorException;
 import org.asamk.signal.commands.exceptions.UserErrorException;
 import org.asamk.signal.manager.AttachmentInvalidException;
 import org.asamk.signal.manager.AvatarStore;
@@ -56,6 +57,7 @@ import java.util.ArrayList;
 import java.util.Base64;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
@@ -349,6 +351,69 @@ public class DbusSignalImpl implements Signal {
         return sendGroupMessageReaction(emoji, remove, targetAuthor, targetSentTimestamp, groupId);
     }
 
+    @Override
+    public void sendContacts() {
+        try {
+            m.sendContacts();
+        } catch (UntrustedIdentityException e) {
+            throw new Error.UntrustedIdentity("SendContacts error: " + e.getMessage());
+        } catch (IOException e) {
+            throw new Error.Failure("SendContacts error: " + e.getMessage());
+        }
+    }
+
+    @Override
+    public void sendSyncRequest() {
+        try {
+            m.requestAllSyncData();
+        } catch (IOException e) {
+            throw new Error.Failure("Request sync data error: " + e.getMessage());
+        }
+    }
+
+    @Override
+    public void trust(String number, String safetyNumber){
+        if (safetyNumber != null) {
+            safetyNumber = safetyNumber.replaceAll(" ", "");
+            if (safetyNumber.length() == 66) {
+                byte[] fingerprintBytes;
+                try {
+                    fingerprintBytes = Hex.toByteArray(safetyNumber.toLowerCase(Locale.ROOT));
+                } catch (Exception e) {
+                    throw new Error.Failure(
+                            "Failed to parse the fingerprint, make sure the fingerprint is a correctly encoded hex string without additional characters.");
+                }
+                boolean res;
+                try {
+                    res = m.trustIdentityVerified(number, fingerprintBytes);
+                } catch (InvalidNumberException e) {
+                    throw new Error.Failure("Failed to parse recipient: " + e.getMessage());
+                }
+                if (!res) {
+                    throw new Error.Failure(
+                            "Failed to set the trust for the fingerprint of this number, make sure the number and the fingerprint are correct.");
+                }
+            } else if (safetyNumber.length() == 60) {
+                boolean res;
+                try {
+                    res = m.trustIdentityVerifiedSafetyNumber(number, safetyNumber);
+                } catch (InvalidNumberException e) {
+                    throw new Error.InvalidNumber("Failed to parse recipient: " + e.getMessage());
+                }
+                if (!res) {
+                    throw new Error.Failure(
+                            "Failed to set the trust for the safety number of this phone number, make sure the phone number and the safety number are correct.");
+                }
+            } else {
+                throw new Error.Failure(
+                        "Safety number has invalid format, either specify the old hex fingerprint or the new safety number");
+            }
+        } else {
+            throw new Error.Failure(
+                    "You need to specify the fingerprint/safety number you have verified with -v SAFETY_NUMBER");
+        }
+    }
+
     @Override
     public void sendTyping(boolean typingAction, String base64GroupId, List<String>recipients) {
         final var noRecipients = recipients == null || recipients.isEmpty();