diff --git a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
index 6531cc68f..ebc7cdaf7 100644
--- a/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
+++ b/Signal/src/ViewControllers/ConversationView/ConversationViewController.m
@@ -44,7 +44,6 @@
 #import "UIViewController+Permissions.h"
 #import "ViewControllerUtils.h"
 #import <AVFoundation/AVFoundation.h>
-#import <AddressBookUI/AddressBookUI.h>
 #import <AssetsLibrary/AssetsLibrary.h>
 #import <ContactsUI/CNContactViewController.h>
 #import <JSQMessagesViewController/JSQMessagesBubbleImage.h>
diff --git a/Signal/src/ViewControllers/ThreadSettings/ShowGroupMembersViewController.m b/Signal/src/ViewControllers/ThreadSettings/ShowGroupMembersViewController.m
index 975834a9c..b5fa90582 100644
--- a/Signal/src/ViewControllers/ThreadSettings/ShowGroupMembersViewController.m
+++ b/Signal/src/ViewControllers/ThreadSettings/ShowGroupMembersViewController.m
@@ -6,7 +6,6 @@
 #import "Signal-Swift.h"
 #import "SignalApp.h"
 #import "ViewControllerUtils.h"
-#import <AddressBookUI/AddressBookUI.h>
 #import <SignalMessaging/BlockListUIUtils.h>
 #import <SignalMessaging/ContactTableViewCell.h>
 #import <SignalMessaging/ContactsViewHelper.h>
diff --git a/SignalMessaging/contacts/OWSContactsManager.m b/SignalMessaging/contacts/OWSContactsManager.m
index 96a3dc6b2..7cda1c4fa 100644
--- a/SignalMessaging/contacts/OWSContactsManager.m
+++ b/SignalMessaging/contacts/OWSContactsManager.m
@@ -19,6 +19,7 @@
 #import <SignalServiceKit/PhoneNumber.h>
 #import <SignalServiceKit/SignalAccount.h>
 
+@import AddressBook;
 @import Contacts;
 
 NSString *const OWSContactsManagerSignalAccountsDidChangeNotification
diff --git a/SignalServiceKit/src/Contacts/Contact.h b/SignalServiceKit/src/Contacts/Contact.h
index 449f7f0c0..f0205c48d 100644
--- a/SignalServiceKit/src/Contacts/Contact.h
+++ b/SignalServiceKit/src/Contacts/Contact.h
@@ -1,8 +1,7 @@
 //
-//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//  Copyright (c) 2018 Open Whisper Systems. All rights reserved.
 //
 
-#import <AddressBook/AddressBook.h>
 #import <Mantle/MTLModel.h>
 
 NS_ASSUME_NONNULL_BEGIN
@@ -16,8 +15,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 @class CNContact;
 @class PhoneNumber;
-@class UIImage;
 @class SignalRecipient;
+@class UIImage;
 @class YapDatabaseReadTransaction;
 
 @interface Contact : MTLModel
@@ -34,7 +33,6 @@ NS_ASSUME_NONNULL_BEGIN
 @property (nonatomic, readonly) BOOL isSignalContact;
 #if TARGET_OS_IOS
 @property (nullable, readonly, nonatomic) UIImage *image;
-@property (readonly, nonatomic) ABRecordID recordID;
 @property (nullable, nonatomic, readonly) CNContact *cnContact;
 #endif // TARGET_OS_IOS
 
@@ -44,12 +42,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 #if TARGET_OS_IOS
 
-- (instancetype)initWithFirstName:(nullable NSString *)firstName
-                         lastName:(nullable NSString *)lastName
-             userTextPhoneNumbers:(NSArray<NSString *> *)phoneNumbers
-                        imageData:(nullable NSData *)imageData
-                        contactID:(ABRecordID)record;
-
 - (instancetype)initWithSystemContact:(CNContact *)contact NS_AVAILABLE_IOS(9_0);
 
 - (NSString *)nameForPhoneNumber:(NSString *)recipientId;
diff --git a/SignalServiceKit/src/Contacts/Contact.m b/SignalServiceKit/src/Contacts/Contact.m
index 35f2d0d5f..74fd195dc 100644
--- a/SignalServiceKit/src/Contacts/Contact.m
+++ b/SignalServiceKit/src/Contacts/Contact.m
@@ -24,36 +24,11 @@ NS_ASSUME_NONNULL_BEGIN
 
 @implementation Contact
 
-@synthesize fullName = _fullName;
 @synthesize comparableNameFirstLast = _comparableNameFirstLast;
 @synthesize comparableNameLastFirst = _comparableNameLastFirst;
 @synthesize image = _image;
 
 #if TARGET_OS_IOS
-- (instancetype)initWithFirstName:(nullable NSString *)firstName
-                         lastName:(nullable NSString *)lastName
-             userTextPhoneNumbers:(NSArray<NSString *> *)phoneNumbers
-                        imageData:(nullable NSData *)imageData
-                        contactID:(ABRecordID)record
-{
-    self = [super init];
-    if (!self) {
-        return self;
-    }
-
-    _firstName = [self trimName:firstName];
-    _lastName = [self trimName:lastName];
-    _uniqueId = [self.class uniqueIdFromABRecordId:record];
-    _recordID = record;
-    _userTextPhoneNumbers = phoneNumbers;
-    _phoneNumberNameMap = [NSMutableDictionary new];
-    _parsedPhoneNumbers = [self parsedPhoneNumbersFromUserTextPhoneNumbers:phoneNumbers phoneNumberNameMap:@{}];
-    _imageData = imageData;
-    // Not using emails for old AB style contacts.
-    _emails = [NSMutableArray new];
-
-    return self;
-}
 
 - (instancetype)initWithSystemContact:(CNContact *)contact
 {
@@ -65,6 +40,7 @@ NS_ASSUME_NONNULL_BEGIN
     _cnContact = contact;
     _firstName = [self trimName:contact.givenName];
     _lastName = [self trimName:contact.familyName];
+    _fullName = [CNContactFormatter stringFromContact:contact style:CNContactFormatterStyleFullName];
     _uniqueId = contact.identifier;
 
     NSMutableArray<NSString *> *phoneNumbers = [NSMutableArray new];
@@ -129,7 +105,7 @@ NS_ASSUME_NONNULL_BEGIN
     _emails = [emailAddresses copy];
 
     if (contact.thumbnailImageData) {
-        _imageData = contact.thumbnailImageData;
+        _imageData = [contact.thumbnailImageData copy];
     }
 
     return self;
@@ -154,11 +130,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [name stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
 }
 
-+ (NSString *)uniqueIdFromABRecordId:(ABRecordID)recordId
-{
-    return [NSString stringWithFormat:@"ABRecordId:%d", recordId];
-}
-
 + (MTLPropertyStorage)storageBehaviorForPropertyWithKey:(NSString *)propertyKey
 {
     if ([propertyKey isEqualToString:@"cnContact"] || [propertyKey isEqualToString:@"image"]) {
@@ -193,18 +164,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [parsedPhoneNumbers sortedArrayUsingSelector:@selector(compare:)];
 }
 
-- (NSString *)fullName {
-    if (_fullName == nil) {
-        if (ABPersonGetCompositeNameFormat() == kABPersonCompositeNameFormatFirstNameFirst) {
-            _fullName = [self combineLeftName:_firstName withRightName:_lastName usingSeparator:@" "];
-        } else {
-            _fullName = [self combineLeftName:_lastName withRightName:_firstName usingSeparator:@" "];
-        }
-    }
-    
-    return _fullName;
-}
-
 - (NSString *)comparableNameFirstLast {
     if (_comparableNameFirstLast == nil) {
         // Combine the two names with a tab separator, which has a lower ascii code than space, so that first names
@@ -312,16 +271,14 @@ NS_ASSUME_NONNULL_BEGIN
 
     hash = hash ^ self.fullName.hash;
 
-    // base thumbnailHash is some arbitrary number
-    NSUInteger thumbnailHash = 389201946;
-    if (self.cnContact.thumbnailImageData) {
+    if (self.imageData) {
+        NSUInteger thumbnailHash = 0;
         NSData *thumbnailHashData =
-            [Cryptography computeSHA256Digest:self.cnContact.thumbnailImageData truncatedToBytes:sizeof(thumbnailHash)];
+            [Cryptography computeSHA256Digest:self.imageData truncatedToBytes:sizeof(thumbnailHash)];
         [thumbnailHashData getBytes:&thumbnailHash length:sizeof(thumbnailHash)];
+        hash = hash ^ thumbnailHash;
     }
 
-    hash = hash ^ thumbnailHash;
-
     for (PhoneNumber *phoneNumber in self.parsedPhoneNumbers) {
         hash = hash ^ phoneNumber.toE164.hash;
     }