diff --git a/matrixConsole/Model/ConsoleContact.h b/matrixConsole/Model/ConsoleContact.h
index b90fea8a4..b3e6f7c3b 100644
--- a/matrixConsole/Model/ConsoleContact.h
+++ b/matrixConsole/Model/ConsoleContact.h
@@ -24,21 +24,18 @@ extern NSString *const kConsoleContactMatrixIdentifierUpdateNotification;
 // the contactID is provided in parameter
 extern NSString *const kConsoleContactThumbnailUpdateNotification;
 
-@interface ConsoleContact : NSObject {
-    UIImage* contactBookThumbnail;
-    UIImage* matrixThumbnail;
-}
+@interface ConsoleContact : NSObject
 
 // unique identifier
-@property (nonatomic, copy, readwrite) NSString * contactID;
+@property (nonatomic, readonly) NSString * contactID;
 // display name
-@property (nonatomic, copy, readwrite) NSString *displayName;
+@property (nonatomic, readonly) NSString *displayName;
 // contact thumbnail
 @property (nonatomic, copy, readonly) UIImage *thumbnail;
 // array of ConsolePhoneNumber
-@property (nonatomic, readwrite) NSArray *phoneNumbers;
+@property (nonatomic, readonly) NSArray *phoneNumbers;
 // array of ConsoleEmail
-@property (nonatomic, readwrite) NSArray *emailAddresses;
+@property (nonatomic, readonly) NSArray *emailAddresses;
 // array of matrix identifiers
 @property (nonatomic, readonly) NSArray* matrixIdentifiers;
 
diff --git a/matrixConsole/Model/ConsoleContact.m b/matrixConsole/Model/ConsoleContact.m
index f06c59ef5..8a5be369a 100644
--- a/matrixConsole/Model/ConsoleContact.m
+++ b/matrixConsole/Model/ConsoleContact.m
@@ -16,6 +16,9 @@
 
 #import "ConsoleContact.h"
 
+#import "ConsoleEmail.h"
+#import "ConsolePhoneNumber.h"
+
 // warn when a contact has a new matrix identifier
 // the contactID is provided in parameter
 NSString *const kConsoleContactMatrixIdentifierUpdateNotification = @"kConsoleContactMatrixIdentifierUpdateNotification";
@@ -24,27 +27,28 @@ NSString *const kConsoleContactMatrixIdentifierUpdateNotification = @"kConsoleCo
 // the contactID is provided in parameter
 NSString *const kConsoleContactThumbnailUpdateNotification = @"kConsoleContactThumbnailUpdateNotification";
 
-#import "ConsoleEmail.h"
-#import "ConsolePhoneNumber.h"
+@interface ConsoleContact() {
+    UIImage* contactBookThumbnail;
+    UIImage* matrixThumbnail;
+}
+@end
 
 @implementation ConsoleContact
-@synthesize displayName, phoneNumbers, emailAddresses, contactID;
 
 - (id) initWithABRecord:(ABRecordRef)record {
     self = [super init];
     
     if (self) {
-
         // compute a contact ID
-        self.contactID = [NSString stringWithFormat:@"%d", ABRecordGetRecordID(record)];
+        _contactID = [NSString stringWithFormat:@"%d", ABRecordGetRecordID(record)];
 
         // use the contact book display name
-        self.displayName = (__bridge NSString*) ABRecordCopyCompositeName(record);
+        _displayName = (__bridge NSString*) ABRecordCopyCompositeName(record);
         
         // avoid nil display name
         // the display name is used to sort contacts
         if (!self.displayName) {
-            displayName = @"";
+            _displayName = @"";
         }
         
         // extract the phone numbers and their related label
@@ -93,7 +97,7 @@ NSString *const kConsoleContactThumbnailUpdateNotification = @"kConsoleContactTh
         }
         
         CFRelease(multi);
-        phoneNumbers = pns;
+        _phoneNumbers = pns;
         
         // extract the emails
         multi = ABRecordCopyValue(record, kABPersonEmailProperty);
@@ -145,7 +149,7 @@ NSString *const kConsoleContactThumbnailUpdateNotification = @"kConsoleContactTh
         
         CFRelease(multi);
 
-        emailAddresses = emails;
+        _emailAddresses = emails;
         
         // thumbnail/picture
         // check whether the contact has a picture
diff --git a/matrixConsole/Model/ConsoleEmail.m b/matrixConsole/Model/ConsoleEmail.m
index 859880038..09b06c3e4 100644
--- a/matrixConsole/Model/ConsoleEmail.m
+++ b/matrixConsole/Model/ConsoleEmail.m
@@ -26,17 +26,9 @@
     BOOL gotMatrixID;
 }
 
-@property (nonatomic, readwrite) NSString *type;
-@property (nonatomic, readwrite) NSString *emailAddress;
-@property (nonatomic, readwrite) NSString *contactID;
-@property (nonatomic, readwrite) NSString *matrixUserID;
-@property (nonatomic, readwrite) NSString *avatarURL;
-@property (nonatomic, readwrite) UIImage  *avatarImage;
-
 @end
 
 @implementation ConsoleEmail
-@synthesize type, emailAddress, contactID, matrixUserID, avatarImage, avatarURL;
 
 - (void) commonInit {
     // init statuses
@@ -44,11 +36,11 @@
     pendingMatrixIDRequest = NO;
     
     // init members
-    self.emailAddress = nil;
-    self.type = nil;
-    self.contactID = nil;
-    self.matrixUserID = nil;
-    self.avatarURL = @"";
+    _emailAddress = nil;
+    _type = nil;
+    _contactID = nil;
+    _matrixUserID = nil;
+    _avatarURL = @"";
 }
 
 - (id)init {
@@ -66,9 +58,9 @@
     
     if (self) {
         [self commonInit];
-        self.emailAddress = anEmailAddress;
-        self.type = aType;
-        self.contactID = aContactID;
+        _emailAddress = anEmailAddress;
+        _type = aType;
+        _contactID = aContactID;
     }
     
     return self;
@@ -95,7 +87,7 @@
                                       forMedium:@"email"
                                         success:^(NSString *userId) {
                                             pendingMatrixIDRequest = NO;
-                                            self.matrixUserID = userId;
+                                            _matrixUserID = userId;
                                             gotMatrixID = YES;
                                             
                                             if (self.matrixUserID) {
@@ -138,7 +130,7 @@
             MXUser* user = [mxHandler.mxSession userWithUserId:self.matrixUserID];
             
             if (user) {
-                self.avatarURL = [mxHandler thumbnailURLForContent:user.avatarUrl inViewSize:avatarSize  withMethod:MXThumbnailingMethodCrop];
+                _avatarURL = [mxHandler thumbnailURLForContent:user.avatarUrl inViewSize:avatarSize  withMethod:MXThumbnailingMethodCrop];
                 [self downloadAvatarImage];
                 
             } else {
@@ -146,7 +138,7 @@
                 if (mxHandler.mxRestClient) {
                     [mxHandler.mxRestClient avatarUrlForUser:self.matrixUserID
                                                      success:^(NSString *avatarUrl) {
-                                                         self.avatarURL = [mxHandler thumbnailURLForContent:avatarUrl inViewSize:avatarSize  withMethod:MXThumbnailingMethodCrop];
+                                                         _avatarURL = [mxHandler thumbnailURLForContent:avatarUrl inViewSize:avatarSize  withMethod:MXThumbnailingMethodCrop];
                                                          [self downloadAvatarImage];
                                                      }
                                                      failure:^(NSError *error) {
@@ -167,7 +159,7 @@
     
     if (self.avatarURL.length > 0) {
      
-        self.avatarImage = [MediaManager loadCachePictureForURL:self.avatarURL inFolder:kMediaManagerThumbnailFolder];
+        _avatarImage = [MediaManager loadCachePictureForURL:self.avatarURL inFolder:kMediaManagerThumbnailFolder];
         
         // the image is already in the cache
         if (self.avatarImage) {
@@ -195,7 +187,7 @@
             // update the image
             UIImage* image = [MediaManager loadCachePictureForURL:self.avatarURL inFolder:kMediaManagerThumbnailFolder];
             if (image) {
-                self.avatarImage = image;
+                _avatarImage = image;
                 
                 dispatch_async(dispatch_get_main_queue(), ^{
                     [[NSNotificationCenter defaultCenter] postNotificationName:kConsoleContactThumbnailUpdateNotification object:self.contactID userInfo:nil];
diff --git a/matrixConsole/Model/ConsolePhoneNumber.m b/matrixConsole/Model/ConsolePhoneNumber.m
index bc7f83977..983dad8e9 100644
--- a/matrixConsole/Model/ConsolePhoneNumber.m
+++ b/matrixConsole/Model/ConsolePhoneNumber.m
@@ -16,22 +16,15 @@
 
 #import "ConsolePhoneNumber.h"
 
-@interface ConsolePhoneNumber()
-@property (nonatomic, readwrite) NSString *type;
-@property (nonatomic, readwrite) NSString *textNumber;
-@property (nonatomic, readwrite) NSString *contactID;
-@end
-
 @implementation ConsolePhoneNumber
-@synthesize type, textNumber, contactID;
 
 - (id)initWithTextNumber:(NSString*)aTextNumber andType:(NSString*)aType within:(NSString*)aContactID {
     self = [super init];
     
     if (self) {
-        self.type = aType;
-        self.textNumber = aTextNumber;
-        self.contactID = aContactID;
+        _type = aType;
+        _textNumber = aTextNumber;
+        _contactID = aContactID;
     }
     
     return self;