diff --git a/sift/src/main/java/siftscience/android/Sift.java b/sift/src/main/java/siftscience/android/Sift.java
index 758ec88..7c3eaca 100644
--- a/sift/src/main/java/siftscience/android/Sift.java
+++ b/sift/src/main/java/siftscience/android/Sift.java
@@ -70,12 +70,15 @@ public static void open(@NonNull Context context,
                 appStateCollector = new AppStateCollector(instance, c);
                 unboundUserId = null;
                 hasUnboundUserId = false;
+            } else {
+                if (config != null) {
+                    instance.setConfig(config);
+                }
             }
         }
 
         appStateCollector.setActivityName(activityName == null ?
                 context.getClass().getSimpleName() : activityName);
-
     }
 
     public static void open(@NonNull Context context, String activityName) {
diff --git a/sift/src/main/java/siftscience/android/SiftImpl.java b/sift/src/main/java/siftscience/android/SiftImpl.java
index 8fa37c1..59c8bde 100644
--- a/sift/src/main/java/siftscience/android/SiftImpl.java
+++ b/sift/src/main/java/siftscience/android/SiftImpl.java
@@ -271,10 +271,12 @@ public UnarchiveTask(boolean hasUnboundUserId) {
         public void run() {
             String archive;
 
-            // Unarchive Sift config
-            archive = archives.getString(ArchiveKey.CONFIG.key, null);
-            config = unarchiveConfig(archive);
-            Log.d(TAG, String.format("Unarchived Sift.Config: %s", archive));
+            // Unarchive Sift config if we don't have one
+            if (config == null) {
+                archive = archives.getString(ArchiveKey.CONFIG.key, null);
+                config = unarchiveConfig(archive);
+                Log.d(TAG, String.format("Unarchived Sift.Config: %s", archive));
+            }
 
             // Unarchive User ID if we didn't have an unbound one from the Sift class
             if (!this.hasUnboundUserId) {
@@ -282,8 +284,6 @@ public void run() {
                 Log.d(TAG, String.format("Unarchived User ID: %s", userId));
             }
 
-
-
             // Unarchive Queues
             for (Map.Entry<String, ?> entry : archives.getAll().entrySet()) {
                 String identifier = ArchiveKey.getQueueIdentifier(entry.getKey());
diff --git a/sift/src/test/java/siftscience/android/SiftTest.java b/sift/src/test/java/siftscience/android/SiftTest.java
index 4997d5c..1862f90 100644
--- a/sift/src/test/java/siftscience/android/SiftTest.java
+++ b/sift/src/test/java/siftscience/android/SiftTest.java
@@ -209,6 +209,43 @@ public void testSift() throws Exception {
         assertTrue(preferences.fields.isEmpty());
     }
 
+    @Test
+    public void testConfigPrecedence() {
+        MemorySharedPreferences preferences = new MemorySharedPreferences();
+
+        Sift.Config c1 = new Sift.Config.Builder().withAccountId("sandbox").build();
+        Sift.Config c2 = new Sift.Config.Builder().withAccountId("prod").build();
+
+        MemorySharedPreferences.Editor editor = preferences.edit();
+        editor.putString("config", Sift.GSON.toJson(c1));
+        editor.apply();
+
+        SiftImpl sift = new SiftImpl(
+                mockContext(preferences), c2, "", false, mockTaskManager());
+
+        assertEquals(c2.accountId, sift.getConfig().accountId);
+
+        sift.setConfig(c1);
+
+        assertEquals(c1.accountId, sift.getConfig().accountId);
+    }
+
+    @Test
+    public void testConfigFallback() {
+        MemorySharedPreferences preferences = new MemorySharedPreferences();
+
+        Sift.Config c1 = new Sift.Config.Builder().withAccountId("sandbox").build();
+
+        MemorySharedPreferences.Editor editor = preferences.edit();
+        editor.putString("config", Sift.GSON.toJson(c1));
+        editor.apply();
+
+        SiftImpl sift = new SiftImpl(
+                mockContext(preferences), null, "", false, mockTaskManager());
+
+        assertEquals(c1.accountId, sift.getConfig().accountId);
+    }
+
     @Test
     public void testUnarchiveUnknownProperty() throws IOException {
         String jsonAsString =