diff --git a/src-N/com/android/dialer/compat/UserManagerSdkCompat.java b/src-N/com/android/dialer/compat/UserManagerSdkCompat.java
new file mode 100644
index 0000000..9a08d4e
--- /dev/null
+++ b/src-N/com/android/dialer/compat/UserManagerSdkCompat.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+package com.android.dialer.compat;
+
+import android.content.Context;
+
+/**
+ * UserManagerCompat respecting Sdk requirements
+ */
+public class UserManagerSdkCompat {
+
+    /**
+     * Return whether the calling user is running in an "unlocked" state. A user
+     * is unlocked only after they've entered their credentials (such as a lock
+     * pattern or PIN), and credential-encrypted private app data storage is
+     * available.
+     *
+     * @param context the current context
+     * @return {@code true} if the user is unlocked or context is null, {@code false} otherwise
+     * @throws NullPointerException if context is null
+     */
+    public static boolean isUserUnlocked(Context context) {
+        return android.support.v4.os.UserManagerCompat.isUserUnlocked(context);
+    }
+
+}
diff --git a/src-pre-N/com/android/dialer/compat/UserManagerSdkCompat.java b/src-pre-N/com/android/dialer/compat/UserManagerSdkCompat.java
new file mode 100644
index 0000000..c79ac2f
--- /dev/null
+++ b/src-pre-N/com/android/dialer/compat/UserManagerSdkCompat.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+package com.android.dialer.compat;
+
+import android.content.Context;
+import android.util.Log;
+
+/**
+ * UserManagerCompat respecting Sdk requirements
+ */
+public class UserManagerSdkCompat {
+
+    /**
+     * @return {@code true}
+     */
+    public static boolean isUserUnlocked(Context context) {
+        Log.wtf("UserManagerSdkCompat", "Not implemented");
+        return true;
+    }
+
+}
diff --git a/src/com/android/dialer/compat/UserManagerCompat.java b/src/com/android/dialer/compat/UserManagerCompat.java
index a1fdcc6..5767033 100644
--- a/src/com/android/dialer/compat/UserManagerCompat.java
+++ b/src/com/android/dialer/compat/UserManagerCompat.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.android.dialer.compat;
 
 import android.content.Context;
@@ -34,4 +49,23 @@
         // Adapted from {@link UserManager} and {@link UserHandle}.
         return (Process.myUid() / PER_USER_RANGE) == USER_SYSTEM;
     }
+
+    /**
+     * Return whether the calling user is running in an "unlocked" state. A user
+     * is unlocked only after they've entered their credentials (such as a lock
+     * pattern or PIN), and credential-encrypted private app data storage is
+     * available.
+     *
+     * TODO b/26688153
+     *
+     * @param context the current context
+     * @return {@code true} if the user is unlocked, {@code false} otherwise
+     * @throws NullPointerException if context is null
+     */
+    public static boolean isUserUnlocked(Context context) {
+        if (CompatUtils.isNCompatible()) {
+            return UserManagerSdkCompat.isUserUnlocked(context);
+        }
+        return true;
+    }
 }
diff --git a/tests/src/com/android/dialer/compat/UserManagerCompatTest.java b/tests/src/com/android/dialer/compat/UserManagerCompatTest.java
new file mode 100644
index 0000000..ff734a1
--- /dev/null
+++ b/tests/src/com/android/dialer/compat/UserManagerCompatTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.dialer.compat;
+
+import android.test.AndroidTestCase;
+
+import com.android.contacts.common.compat.CompatUtils;
+
+public class UserManagerCompatTest extends AndroidTestCase {
+
+    public void testIsUserUnlocked_N_NullContext() {
+        if (!CompatUtils.isNCompatible()) {
+            return;
+        }
+        try {
+            UserManagerCompat.isUserUnlocked(null);
+            fail("Expected NullPointerException but none was thrown");
+        } catch (NullPointerException e) {}
+    }
+
+    public void testIsUserUnlocked_M_NullContext() {
+        if (CompatUtils.isNCompatible()) {
+            return;
+        }
+        assertTrue(UserManagerCompat.isUserUnlocked(null));
+    }
+
+    public void testIsUserUnlocked() {
+        assertTrue(UserManagerCompat.isUserUnlocked(getContext()));
+    }
+}