diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemExportIterator.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemExportIterator.kt
index da1b53ad97..3283d3242c 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemExportIterator.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemExportIterator.kt
@@ -11,6 +11,7 @@ import org.json.JSONArray
 import org.json.JSONException
 import org.signal.core.util.Base64
 import org.signal.core.util.Hex
+import org.signal.core.util.emptyIfNull
 import org.signal.core.util.logging.Log
 import org.signal.core.util.orNull
 import org.signal.core.util.requireBlob
@@ -636,8 +637,7 @@ class ChatItemExportIterator(private val cursor: Cursor, private val batchSize:
       familyName = familyName,
       prefix = prefix,
       suffix = suffix,
-      middleName = middleName,
-      displayName = displayName
+      middleName = middleName
     )
   }
 
@@ -699,9 +699,11 @@ class ChatItemExportIterator(private val cursor: Cursor, private val batchSize:
       Quote(
         targetSentTimestamp = this.quoteTargetSentTimestamp.takeIf { !this.quoteMissing && it != MessageTable.QUOTE_TARGET_MISSING_ID },
         authorId = this.quoteAuthor,
-        text = this.quoteBody,
+        text = Text(
+          body = this.quoteBody.emptyIfNull(),
+          bodyRanges = this.quoteBodyRanges?.toBackupBodyRanges() ?: emptyList()
+        ),
         attachments = attachments?.toBackupQuoteAttachments() ?: emptyList(),
-        bodyRanges = this.quoteBodyRanges?.toBackupBodyRanges() ?: emptyList(),
         type = when (type) {
           QuoteModel.Type.NORMAL -> Quote.Type.NORMAL
           QuoteModel.Type.GIFT_BADGE -> Quote.Type.GIFTBADGE
@@ -906,8 +908,7 @@ class ChatItemExportIterator(private val cursor: Cursor, private val batchSize:
           emoji = it.emoji,
           authorId = it.author.toLong(),
           sentTimestamp = it.dateSent,
-          receivedTimestamp = it.dateReceived,
-          sortOrder = 0 // TODO [backup] make this it.dateReceived once comparator support is added
+          sortOrder = it.dateReceived
         )
       } ?: emptyList()
   }
@@ -928,12 +929,12 @@ class ChatItemExportIterator(private val cursor: Cursor, private val batchSize:
     when {
       this.identityMismatchRecipientIds.contains(this.toRecipientId) -> {
         statusBuilder.failed = SendStatus.Failed(
-          identityKeyMismatch = true
+          reason = SendStatus.Failed.FailureReason.IDENTITY_KEY_MISMATCH
         )
       }
       this.networkFailureRecipientIds.contains(this.toRecipientId) -> {
         statusBuilder.failed = SendStatus.Failed(
-          network = true
+          reason = SendStatus.Failed.FailureReason.NETWORK
         )
       }
       this.baseType == MessageTypes.BASE_SENT_TYPE -> {
@@ -973,12 +974,12 @@ class ChatItemExportIterator(private val cursor: Cursor, private val batchSize:
       when {
         identityMismatchRecipientIds.contains(it.recipientId.toLong()) -> {
           statusBuilder.failed = SendStatus.Failed(
-            identityKeyMismatch = true
+            reason = SendStatus.Failed.FailureReason.IDENTITY_KEY_MISMATCH
           )
         }
         networkFailureRecipientIds.contains(it.recipientId.toLong()) -> {
           statusBuilder.failed = SendStatus.Failed(
-            network = true
+            reason = SendStatus.Failed.FailureReason.NETWORK
           )
         }
         it.status == GroupReceiptTable.STATUS_UNKNOWN -> {
diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemImportInserter.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemImportInserter.kt
index e7b71a3801..ab71d2dc1e 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemImportInserter.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ChatItemImportInserter.kt
@@ -69,6 +69,7 @@ import org.thoughtcrime.securesms.payments.CryptoValueUtil
 import org.thoughtcrime.securesms.payments.Direction
 import org.thoughtcrime.securesms.payments.State
 import org.thoughtcrime.securesms.payments.proto.PaymentMetaData
+import org.thoughtcrime.securesms.profiles.ProfileName
 import org.thoughtcrime.securesms.recipients.Recipient
 import org.thoughtcrime.securesms.recipients.RecipientId
 import org.thoughtcrime.securesms.stickers.StickerLocator
@@ -531,7 +532,7 @@ class ChatItemImportInserter(
             ReactionTable.MESSAGE_ID to messageId,
             ReactionTable.AUTHOR_ID to authorId,
             ReactionTable.DATE_SENT to it.sentTimestamp,
-            ReactionTable.DATE_RECEIVED to (it.receivedTimestamp ?: it.sortOrder),
+            ReactionTable.DATE_RECEIVED to it.sortOrder,
             ReactionTable.EMOJI to it.emoji
           )
         } else {
@@ -571,9 +572,9 @@ class ChatItemImportInserter(
 
   private fun ChatItem.getMessageType(): Long {
     var type: Long = if (this.outgoing != null) {
-      if (this.outgoing.sendStatus.count { it.failed?.identityKeyMismatch == true } > 0) {
+      if (this.outgoing.sendStatus.count { it.failed?.reason == SendStatus.Failed.FailureReason.IDENTITY_KEY_MISMATCH } > 0) {
         MessageTypes.BASE_SENT_FAILED_TYPE
-      } else if (this.outgoing.sendStatus.count { it.failed?.network == true } > 0) {
+      } else if (this.outgoing.sendStatus.count { it.failed?.reason == SendStatus.Failed.FailureReason.NETWORK } > 0) {
         MessageTypes.BASE_SENDING_TYPE
       } else {
         MessageTypes.BASE_SENT_TYPE
@@ -812,10 +813,10 @@ class ChatItemImportInserter(
   private fun ContentValues.addQuote(quote: Quote) {
     this.put(MessageTable.QUOTE_ID, quote.targetSentTimestamp ?: MessageTable.QUOTE_TARGET_MISSING_ID)
     this.put(MessageTable.QUOTE_AUTHOR, importState.remoteToLocalRecipientId[quote.authorId]!!.serialize())
-    this.put(MessageTable.QUOTE_BODY, quote.text)
+    this.put(MessageTable.QUOTE_BODY, quote.text?.body)
     this.put(MessageTable.QUOTE_TYPE, quote.type.toLocalQuoteType())
-    this.put(MessageTable.QUOTE_BODY_RANGES, quote.bodyRanges.toLocalBodyRanges()?.encode())
-    // TODO quote attachments
+    this.put(MessageTable.QUOTE_BODY_RANGES, quote.text?.bodyRanges?.toLocalBodyRanges()?.encode())
+    // TODO [backup] quote attachments
     this.put(MessageTable.QUOTE_MISSING, (quote.targetSentTimestamp == null).toInt())
   }
 
@@ -842,7 +843,7 @@ class ChatItemImportInserter(
     }
 
     val networkFailures = chatItem.outgoing.sendStatus
-      .filter { status -> status.failed?.network ?: false }
+      .filter { status -> status.failed?.reason == SendStatus.Failed.FailureReason.NETWORK }
       .mapNotNull { status -> importState.remoteToLocalRecipientId[status.recipientId] }
       .map { recipientId -> NetworkFailure(recipientId) }
       .toSet()
@@ -858,7 +859,7 @@ class ChatItemImportInserter(
     }
 
     val mismatches = chatItem.outgoing.sendStatus
-      .filter { status -> status.failed?.identityKeyMismatch ?: false }
+      .filter { status -> status.failed?.reason == SendStatus.Failed.FailureReason.IDENTITY_KEY_MISMATCH }
       .mapNotNull { status -> importState.remoteToLocalRecipientId[status.recipientId] }
       .map { recipientId -> IdentityKeyMismatch(recipientId, null) } // TODO We probably want the actual identity key in this status situation?
       .toSet()
@@ -1057,7 +1058,8 @@ class ChatItemImportInserter(
   }
 
   private fun ContactAttachment.Name?.toLocal(): Contact.Name {
-    return Contact.Name(this?.displayName, this?.givenName, this?.familyName, this?.prefix, this?.suffix, this?.middleName)
+    val displayName = ProfileName.fromParts(this?.givenName, this?.familyName).toString()
+    return Contact.Name(displayName, this?.givenName, this?.familyName, this?.prefix, this?.suffix, this?.middleName)
   }
 
   private fun ContactAttachment.Phone.Type?.toLocal(): Contact.Phone.Type {
diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/RecipientTableBackupExtensions.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/RecipientTableBackupExtensions.kt
index 643e67d783..7d7fe0a21d 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/RecipientTableBackupExtensions.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/RecipientTableBackupExtensions.kt
@@ -324,11 +324,11 @@ private fun DecryptedGroup.toSnapshot(): Group.GroupSnapshot? {
 }
 
 private fun Group.Member.toLocal(): DecryptedMember {
-  return DecryptedMember(aciBytes = userId, role = role.toLocal(), profileKey = profileKey, joinedAtRevision = joinedAtVersion)
+  return DecryptedMember(aciBytes = userId, role = role.toLocal(), joinedAtRevision = joinedAtVersion)
 }
 
 private fun DecryptedMember.toSnapshot(): Group.Member {
-  return Group.Member(userId = aciBytes, role = role.toSnapshot(), profileKey = profileKey, joinedAtVersion = joinedAtRevision)
+  return Group.Member(userId = aciBytes, role = role.toSnapshot(), joinedAtVersion = joinedAtRevision)
 }
 
 private fun Group.MemberPendingProfileKey.toLocal(operations: GroupsV2Operations.GroupOperations): DecryptedPendingMember {
@@ -355,7 +355,6 @@ private fun DecryptedPendingMember.toSnapshot(): Group.MemberPendingProfileKey {
 private fun Group.MemberPendingAdminApproval.toLocal(): DecryptedRequestingMember {
   return DecryptedRequestingMember(
     aciBytes = this.userId,
-    profileKey = this.profileKey,
     timestamp = this.timestamp
   )
 }
@@ -363,7 +362,6 @@ private fun Group.MemberPendingAdminApproval.toLocal(): DecryptedRequestingMembe
 private fun DecryptedRequestingMember.toSnapshot(): Group.MemberPendingAdminApproval {
   return Group.MemberPendingAdminApproval(
     userId = this.aciBytes,
-    profileKey = this.profileKey,
     timestamp = this.timestamp
   )
 }
diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ThreadTableBackupExtensions.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ThreadTableBackupExtensions.kt
index 792c8127a1..c2f4036617 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ThreadTableBackupExtensions.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/database/ThreadTableBackupExtensions.kt
@@ -39,6 +39,7 @@ fun ThreadTable.getThreadsForBackup(): ChatExportIterator {
         ${ThreadTable.READ}, 
         ${ThreadTable.ARCHIVED},
         ${RecipientTable.TABLE_NAME}.${RecipientTable.MESSAGE_EXPIRATION_TIME},
+        ${RecipientTable.TABLE_NAME}.${RecipientTable.MESSAGE_EXPIRATION_TIME_VERSION},
         ${RecipientTable.TABLE_NAME}.${RecipientTable.MUTE_UNTIL},
         ${RecipientTable.TABLE_NAME}.${RecipientTable.MENTION_SETTING}, 
         ${RecipientTable.TABLE_NAME}.${RecipientTable.CHAT_COLORS},
@@ -73,6 +74,7 @@ fun ThreadTable.restoreFromBackup(chat: Chat, recipientId: RecipientId, importSt
       ThreadTable.ACTIVE to 1
     )
     .run()
+
   writableDatabase
     .update(
       RecipientTable.TABLE_NAME,
@@ -80,6 +82,7 @@ fun ThreadTable.restoreFromBackup(chat: Chat, recipientId: RecipientId, importSt
         RecipientTable.MENTION_SETTING to (if (chat.dontNotifyForMentionsIfMuted) RecipientTable.MentionSetting.DO_NOT_NOTIFY.id else RecipientTable.MentionSetting.ALWAYS_NOTIFY.id),
         RecipientTable.MUTE_UNTIL to chat.muteUntilMs,
         RecipientTable.MESSAGE_EXPIRATION_TIME to chat.expirationTimerMs,
+        RecipientTable.MESSAGE_EXPIRATION_TIME_VERSION to chat.expireTimerVersion,
         RecipientTable.CHAT_COLORS to chatColor?.serialize()?.encode(),
         RecipientTable.CUSTOM_CHAT_COLORS_ID to (chatColor?.id ?: ChatColors.Id.NotSet).longValue
       ),
@@ -116,6 +119,7 @@ class ChatExportIterator(private val cursor: Cursor) : Iterator<Chat>, Closeable
       archived = cursor.requireBoolean(ThreadTable.ARCHIVED),
       pinnedOrder = cursor.requireInt(ThreadTable.PINNED),
       expirationTimerMs = cursor.requireLong(RecipientTable.MESSAGE_EXPIRATION_TIME),
+      expireTimerVersion = cursor.requireInt(RecipientTable.MESSAGE_EXPIRATION_TIME_VERSION),
       muteUntilMs = cursor.requireLong(RecipientTable.MUTE_UNTIL),
       markedUnread = ThreadTable.ReadStatus.deserialize(cursor.requireInt(ThreadTable.READ)) == ThreadTable.ReadStatus.FORCED_UNREAD,
       dontNotifyForMentionsIfMuted = RecipientTable.MentionSetting.DO_NOT_NOTIFY.id == cursor.requireInt(RecipientTable.MENTION_SETTING),
diff --git a/app/src/main/java/org/thoughtcrime/securesms/contactshare/Contact.java b/app/src/main/java/org/thoughtcrime/securesms/contactshare/Contact.java
index 36f50ab5fd..487fab8105 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/contactshare/Contact.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/contactshare/Contact.java
@@ -160,7 +160,8 @@ public class Contact implements Parcelable {
     @JsonProperty
     private final String middleName;
 
-    public Name(@JsonProperty("displayName") @Nullable String displayName,
+    public Name(
+         @JsonProperty("displayName") @Nullable String displayName,
          @JsonProperty("givenName")   @Nullable String givenName,
          @JsonProperty("familyName")  @Nullable String familyName,
          @JsonProperty("prefix")      @Nullable String prefix,
diff --git a/app/src/main/protowire/Backup.proto b/app/src/main/protowire/Backup.proto
index cb3908bae2..b0b63315c8 100644
--- a/app/src/main/protowire/Backup.proto
+++ b/app/src/main/protowire/Backup.proto
@@ -3,6 +3,7 @@ syntax = "proto3";
 package signal.backup;
 
 option java_package = "org.thoughtcrime.securesms.backup.v2.proto";
+option swift_prefix = "BackupProto_";
 
 message BackupInfo {
   uint64 version = 1;
@@ -190,8 +191,8 @@ message Group {
 
     bytes userId = 1;
     Role role = 2;
-    bytes profileKey = 3;
-    reserved /*presentation*/ 4; // The field is deprecated in the context of static group state
+    reserved /*profileKey*/ 3; // This field is ignored in Backups, in favor of Contact frames for members
+    reserved /*presentation*/ 4; // This field is deprecated in the context of static group state
     uint32 joinedAtVersion = 5;
   }
 
@@ -203,8 +204,8 @@ message Group {
 
   message MemberPendingAdminApproval {
     bytes userId = 1;
-    bytes profileKey = 2;
-    reserved /*presentation*/ 3; // The field is deprecated in the context of static group state
+    reserved /*profileKey*/ 2; // This field is ignored in Backups, in favor of Contact frames for members
+    reserved /*presentation*/ 3; // This field is deprecated in the context of static group state
     uint64 timestamp = 4;
   }
 
@@ -242,6 +243,7 @@ message Chat {
   bool markedUnread = 7;
   bool dontNotifyForMentionsIfMuted = 8;
   ChatStyle style = 9;
+  uint32 expireTimerVersion = 10;
 }
 
 /**
@@ -365,10 +367,13 @@ message SendStatus {
   message Skipped {}
 
   message Failed {
-    oneof reason {
-      bool network = 1;
-      bool identityKeyMismatch = 2;
+    enum FailureReason {
+      UNKNOWN = 0; // A valid value -- could indicate a crash or lack of information
+      NETWORK = 1;
+      IDENTITY_KEY_MISMATCH = 2;
     }
+
+    FailureReason reason = 1;
   }
 
   uint64 recipientId = 1;
@@ -471,7 +476,6 @@ message ContactAttachment {
     optional string prefix = 3;
     optional string suffix = 4;
     optional string middleName = 5;
-    optional string displayName = 6;
   }
 
   message Phone {
@@ -646,10 +650,9 @@ message Quote {
 
   optional uint64 targetSentTimestamp = 1; // null if the target message could not be found at time of quote insert
   uint64 authorId = 2;
-  optional string text = 3;
+  optional Text text = 3;
   repeated QuotedAttachment attachments = 4;
-  repeated BodyRange bodyRanges = 5;
-  Type type = 6;
+  Type type = 5;
 }
 
 message BodyRange {
@@ -675,11 +678,9 @@ message Reaction {
   string emoji = 1;
   uint64 authorId = 2;
   uint64 sentTimestamp = 3;
-  // Optional because some clients may not track this data
-  optional uint64 receivedTimestamp = 4;
   // A higher sort order means that a reaction is more recent. Some clients may export this as
   // incrementing numbers (e.g. 1, 2, 3), others as timestamps.
-  uint64 sortOrder = 5;
+  uint64 sortOrder = 4;
 }
 
 message ChatUpdateMessage {
@@ -726,6 +727,7 @@ message IndividualCall {
   Direction direction = 3;
   State state = 4;
   uint64 startedCallTimestamp = 5;
+  bool read = 6;
 }
 
 message GroupCall {
@@ -757,6 +759,7 @@ message GroupCall {
   uint64 startedCallTimestamp = 5;
   // The time the call ended. 0 indicates an unknown time.
   uint64 endedCallTimestamp = 6;
+  bool read = 7;
 }
 
 message SimpleChatUpdate {
@@ -777,7 +780,7 @@ message SimpleChatUpdate {
     REPORTED_SPAM = 13;
     BLOCKED = 14;
     UNBLOCKED = 15;
-    ACCEPTED = 16;
+    MESSAGE_REQUEST_ACCEPTED = 16;
   }
 
   Type type = 1;
@@ -1064,7 +1067,7 @@ message StickerPack {
 message ChatStyle {
   message Gradient {
     uint32 angle = 1; // degrees
-    repeated fixed32 colors = 2;
+    repeated fixed32 colors = 2; // 0xAARRGGBB
     repeated float positions = 3; // percent from 0 to 1
   }
 
@@ -1072,7 +1075,7 @@ message ChatStyle {
     uint64 id = 1;
 
     oneof color {
-      fixed32 solid = 2;
+      fixed32 solid = 2; // 0xAARRGGBB
       Gradient gradient = 3;
     }
   }
@@ -1133,6 +1136,8 @@ message ChatStyle {
 
   oneof wallpaper {
     WallpaperPreset wallpaperPreset = 1;
+    // This `FilePointer` is expected not to contain a `fileName`, `width`,
+    // `height`, or `caption`.
     FilePointer wallpaperPhoto = 2;
   }