diff --git a/src-N/com/android/dialer/compat/CallsSdkCompat.java b/src-N/com/android/dialer/compat/CallsSdkCompat.java
new file mode 100644
index 0000000..3d72e35
--- /dev/null
+++ b/src-N/com/android/dialer/compat/CallsSdkCompat.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2016 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.provider.CallLog;
+
+public class CallsSdkCompat {
+
+    public static final String POST_DIAL_DIGITS = CallLog.Calls.POST_DIAL_DIGITS;
+}
diff --git a/src-pre-N/com/android/dialer/compat/CallsSdkCompat.java b/src-pre-N/com/android/dialer/compat/CallsSdkCompat.java
new file mode 100644
index 0000000..836f091
--- /dev/null
+++ b/src-pre-N/com/android/dialer/compat/CallsSdkCompat.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2016 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.support.annotation.Nullable;
+
+public class CallsSdkCompat {
+
+    @Nullable public static final String POST_DIAL_DIGITS = null;
+}
diff --git a/src/com/android/dialer/calllog/CallLogAdapter.java b/src/com/android/dialer/calllog/CallLogAdapter.java
index e97f8e2..dfb5190 100644
--- a/src/com/android/dialer/calllog/CallLogAdapter.java
+++ b/src/com/android/dialer/calllog/CallLogAdapter.java
@@ -16,10 +16,6 @@
 
 package com.android.dialer.calllog;
 
-import com.android.contacts.common.util.PermissionsUtil;
-
-import com.android.dialer.DialtactsActivity;
-import com.android.dialer.database.VoicemailArchiveContract;
 import com.google.common.annotations.VisibleForTesting;
 
 import android.content.Context;
@@ -40,7 +36,6 @@
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.ArrayMap;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.AccessibilityDelegate;
@@ -48,15 +43,18 @@
 import android.view.accessibility.AccessibilityEvent;
 
 import com.android.contacts.common.ContactsUtils;
+import com.android.contacts.common.compat.CompatUtils;
 import com.android.contacts.common.compat.PhoneNumberUtilsCompat;
 import com.android.contacts.common.preference.ContactsPreferences;
 import com.android.contacts.common.util.PermissionsUtil;
+import com.android.dialer.DialtactsActivity;
 import com.android.dialer.PhoneCallDetails;
 import com.android.dialer.R;
 import com.android.dialer.calllog.calllogcache.CallLogCache;
 import com.android.dialer.contactinfo.ContactInfoCache;
 import com.android.dialer.contactinfo.ContactInfoCache.OnContactInfoChangedListener;
 import com.android.dialer.database.FilteredNumberAsyncQueryHandler;
+import com.android.dialer.database.VoicemailArchiveContract;
 import com.android.dialer.filterednumber.BlockNumberDialogFragment.Callback;
 import com.android.dialer.logging.InteractionEvent;
 import com.android.dialer.logging.Logger;
@@ -492,7 +490,7 @@
         int count = getGroupSize(position);
 
         final String number = c.getString(CallLogQuery.NUMBER);
-        final String postDialDigits = PhoneNumberDisplayUtil.canShowPostDial()
+        final String postDialDigits = CompatUtils.isNCompatible()
                 && mActivityType != ACTIVITY_TYPE_ARCHIVE ?
                 c.getString(CallLogQuery.POST_DIAL_DIGITS) : "";
 
diff --git a/src/com/android/dialer/calllog/CallLogAsyncTaskUtil.java b/src/com/android/dialer/calllog/CallLogAsyncTaskUtil.java
index 13de077..7cb35f5 100644
--- a/src/com/android/dialer/calllog/CallLogAsyncTaskUtil.java
+++ b/src/com/android/dialer/calllog/CallLogAsyncTaskUtil.java
@@ -16,6 +16,8 @@
 
 package com.android.dialer.calllog;
 
+import com.google.common.annotations.VisibleForTesting;
+
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
@@ -30,18 +32,16 @@
 import android.util.Log;
 
 import com.android.contacts.common.GeoUtil;
+import com.android.contacts.common.compat.CompatUtils;
 import com.android.contacts.common.util.PermissionsUtil;
-import com.android.dialer.DialtactsActivity;
 import com.android.dialer.PhoneCallDetails;
+import com.android.dialer.compat.CallsSdkCompat;
 import com.android.dialer.database.VoicemailArchiveContract;
-import com.android.dialer.util.AppCompatConstants;
 import com.android.dialer.util.AsyncTaskExecutor;
 import com.android.dialer.util.AsyncTaskExecutors;
 import com.android.dialer.util.PhoneNumberUtil;
 import com.android.dialer.util.TelecomUtil;
 
-import com.google.common.annotations.VisibleForTesting;
-
 import java.util.ArrayList;
 import java.util.Arrays;
 
@@ -94,8 +94,8 @@
         static {
             ArrayList<String> projectionList = new ArrayList<>();
             projectionList.addAll(Arrays.asList(CALL_LOG_PROJECTION_INTERNAL));
-            if (PhoneNumberDisplayUtil.canShowPostDial()) {
-                projectionList.add(AppCompatConstants.POST_DIAL_DIGITS);
+            if (CompatUtils.isNCompatible()) {
+                projectionList.add(CallsSdkCompat.POST_DIAL_DIGITS);
             }
             projectionList.trimToSize();
             CALL_LOG_PROJECTION = projectionList.toArray(new String[projectionList.size()]);
@@ -113,13 +113,13 @@
     }
 
     public interface CallLogAsyncTaskListener {
-        public void onDeleteCall();
-        public void onDeleteVoicemail();
-        public void onGetCallDetails(PhoneCallDetails[] details);
+        void onDeleteCall();
+        void onDeleteVoicemail();
+        void onGetCallDetails(PhoneCallDetails[] details);
     }
 
     public interface OnCallLogQueryFinishedListener {
-        public void onQueryFinished(boolean hasEntry);
+        void onQueryFinished(boolean hasEntry);
     }
 
     // Try to identify if a call log entry corresponds to a number which was blocked. We match by
@@ -185,7 +185,7 @@
             // Read call log.
             final String countryIso = cursor.getString(CallDetailQuery.COUNTRY_ISO_COLUMN_INDEX);
             final String number = cursor.getString(CallDetailQuery.NUMBER_COLUMN_INDEX);
-            final String postDialDigits = PhoneNumberDisplayUtil.canShowPostDial()
+            final String postDialDigits = CompatUtils.isNCompatible()
                     ? cursor.getString(CallDetailQuery.POST_DIAL_DIGITS) : "";
             final int numberPresentation =
                     cursor.getInt(CallDetailQuery.NUMBER_PRESENTATION_COLUMN_INDEX);
diff --git a/src/com/android/dialer/calllog/CallLogGroupBuilder.java b/src/com/android/dialer/calllog/CallLogGroupBuilder.java
index 950f634..0931e06 100644
--- a/src/com/android/dialer/calllog/CallLogGroupBuilder.java
+++ b/src/com/android/dialer/calllog/CallLogGroupBuilder.java
@@ -16,17 +16,18 @@
 
 package com.android.dialer.calllog;
 
+import com.google.common.annotations.VisibleForTesting;
+
 import android.database.Cursor;
 import android.telephony.PhoneNumberUtils;
-import android.text.format.Time;
 import android.text.TextUtils;
+import android.text.format.Time;
 
+import com.android.contacts.common.compat.CompatUtils;
 import com.android.contacts.common.util.DateUtils;
 import com.android.contacts.common.util.PhoneNumberHelper;
 import com.android.dialer.util.AppCompatConstants;
 
-import com.google.common.annotations.VisibleForTesting;
-
 /**
  * Groups together calls in the call log.  The primary grouping attempts to group together calls
  * to and from the same number into a single row on the call log.
@@ -122,7 +123,7 @@
 
         // Instantiate the group values to those of the first call in the cursor.
         String groupNumber = cursor.getString(CallLogQuery.NUMBER);
-        String groupPostDialDigits = PhoneNumberDisplayUtil.canShowPostDial()
+        String groupPostDialDigits = CompatUtils.isNCompatible()
                 ? cursor.getString(CallLogQuery.POST_DIAL_DIGITS) : "";
         int groupCallType = cursor.getInt(CallLogQuery.CALL_TYPE);
         String groupAccountComponentName = cursor.getString(CallLogQuery.ACCOUNT_COMPONENT_NAME);
@@ -138,7 +139,7 @@
         while (cursor.moveToNext()) {
             // Obtain the values for the current call to group.
             number = cursor.getString(CallLogQuery.NUMBER);
-            numberPostDialDigits = PhoneNumberDisplayUtil.canShowPostDial()
+            numberPostDialDigits = CompatUtils.isNCompatible()
                     ? cursor.getString(CallLogQuery.POST_DIAL_DIGITS) : "";
             callType = cursor.getInt(CallLogQuery.CALL_TYPE);
             accountComponentName = cursor.getString(CallLogQuery.ACCOUNT_COMPONENT_NAME);
diff --git a/src/com/android/dialer/calllog/CallLogQuery.java b/src/com/android/dialer/calllog/CallLogQuery.java
index 905a4b7..4900354 100644
--- a/src/com/android/dialer/calllog/CallLogQuery.java
+++ b/src/com/android/dialer/calllog/CallLogQuery.java
@@ -16,12 +16,13 @@
 
 package com.android.dialer.calllog;
 
+import com.google.common.collect.Lists;
+
 import android.provider.CallLog.Calls;
 
+import com.android.contacts.common.compat.CompatUtils;
+import com.android.dialer.compat.CallsSdkCompat;
 import com.android.dialer.compat.DialerCompatUtils;
-import com.android.dialer.util.AppCompatConstants;
-
-import com.google.common.collect.Lists;
 
 import java.util.List;
 
@@ -89,7 +90,7 @@
 
     /**
      * Only available in versions > M
-     * Call {@link PhoneNumberDisplayUtil#canShowPostDial()} prior to use
+     * Call {@link CompatUtils#isNCompatible()} prior to use
      */
     public static int POST_DIAL_DIGITS = -1;
 
@@ -101,8 +102,8 @@
             projectionList.add(Calls.CACHED_PHOTO_URI);
             CACHED_PHOTO_URI = projectionList.size() - 1;
         }
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
-            projectionList.add(AppCompatConstants.POST_DIAL_DIGITS);
+        if (CompatUtils.isNCompatible()) {
+            projectionList.add(CallsSdkCompat.POST_DIAL_DIGITS);
             POST_DIAL_DIGITS = projectionList.size() - 1;
         }
         _PROJECTION = projectionList.toArray(new String[projectionList.size()]);
diff --git a/src/com/android/dialer/calllog/ContactInfoHelper.java b/src/com/android/dialer/calllog/ContactInfoHelper.java
index ff7a3f6..6e84a92 100644
--- a/src/com/android/dialer/calllog/ContactInfoHelper.java
+++ b/src/com/android/dialer/calllog/ContactInfoHelper.java
@@ -32,6 +32,7 @@
 
 import com.android.contacts.common.ContactsUtils;
 import com.android.contacts.common.ContactsUtils.UserType;
+import com.android.contacts.common.compat.CompatUtils;
 import com.android.contacts.common.util.Constants;
 import com.android.contacts.common.util.PermissionsUtil;
 import com.android.contacts.common.util.PhoneNumberHelper;
@@ -41,7 +42,6 @@
 import com.android.dialer.service.CachedNumberLookupService.CachedContactInfo;
 import com.android.dialer.util.TelecomUtil;
 import com.android.dialerbind.ObjectFactory;
-import com.google.common.annotations.VisibleForTesting;
 
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -435,7 +435,7 @@
         info.type = c.getInt(CallLogQuery.CACHED_NUMBER_TYPE);
         info.label = c.getString(CallLogQuery.CACHED_NUMBER_LABEL);
         String matchedNumber = c.getString(CallLogQuery.CACHED_MATCHED_NUMBER);
-        String postDialDigits = PhoneNumberDisplayUtil.canShowPostDial()
+        String postDialDigits = CompatUtils.isNCompatible()
                 ? c.getString(CallLogQuery.POST_DIAL_DIGITS) : "";
         info.number = (matchedNumber == null) ?
                 c.getString(CallLogQuery.NUMBER) + postDialDigits : matchedNumber;
diff --git a/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java b/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java
index 09b42e9..5b1fc9e 100644
--- a/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java
+++ b/src/com/android/dialer/calllog/PhoneNumberDisplayUtil.java
@@ -17,7 +17,6 @@
 package com.android.dialer.calllog;
 
 import android.content.Context;
-import android.os.Build;
 import android.provider.CallLog.Calls;
 import android.text.TextUtils;
 
@@ -81,13 +80,4 @@
             return context.getResources().getString(R.string.unknown);
         }
     }
-
-    /**
-     * Returns whether we can expect the post-dial digits to be in the call log.
-     *
-     * These digits will be present in versions N+.
-     */
-    public static boolean canShowPostDial() {
-        return Build.VERSION.SDK_INT > Build.VERSION_CODES.M;
-    }
 }
diff --git a/src/com/android/dialer/util/AppCompatConstants.java b/src/com/android/dialer/util/AppCompatConstants.java
index 0bb78df..1d52eee 100644
--- a/src/com/android/dialer/util/AppCompatConstants.java
+++ b/src/com/android/dialer/util/AppCompatConstants.java
@@ -27,6 +27,4 @@
     public static final int CALLS_REJECTED_TYPE = 5;
     // Added to android.provider.CallLog.Calls in N+.
     public static final int CALLS_BLOCKED_TYPE = 6;
-    // Added to android.provider.CallLog.Calls in N+.
-    public static final String POST_DIAL_DIGITS = "post_dial_digits";
 }
diff --git a/tests/src/com/android/dialer/calllog/CallLogAdapterTest.java b/tests/src/com/android/dialer/calllog/CallLogAdapterTest.java
index e801311..f6ef7ef 100644
--- a/tests/src/com/android/dialer/calllog/CallLogAdapterTest.java
+++ b/tests/src/com/android/dialer/calllog/CallLogAdapterTest.java
@@ -16,6 +16,8 @@
 
 package com.android.dialer.calllog;
 
+import com.google.common.collect.Lists;
+
 import android.content.ContentUris;
 import android.content.Context;
 import android.content.Intent;
@@ -29,12 +31,12 @@
 import android.text.TextUtils;
 import android.view.View;
 
+import com.android.contacts.common.compat.CompatUtils;
 import com.android.contacts.common.preference.ContactsPreferences;
 import com.android.dialer.contactinfo.ContactInfoCache;
 import com.android.dialer.database.VoicemailArchiveContract;
 import com.android.dialer.util.AppCompatConstants;
 import com.android.dialer.util.TestConstants;
-import com.google.common.collect.Lists;
 
 import java.util.Date;
 import java.util.List;
@@ -235,7 +237,7 @@
         mAdapter.changeCursor(mCursor);
         mAdapter.onBindViewHolder(mViewHolder, 0);
 
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (CompatUtils.isNCompatible()) {
             assertHasCallActionToGivenNumber(mViewHolder, TEST_NUMBER + TEST_POST_DIAL_DIGITS);
         }
     }
@@ -259,7 +261,7 @@
         mAdapter.changeCursor(mCursor);
         mAdapter.onBindViewHolder(mViewHolder, 0);
 
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (CompatUtils.isNCompatible()) {
             assertNameIs(mViewHolder, TEST_NUMBER + TEST_POST_DIAL_DIGITS);
         }
     }
@@ -273,7 +275,7 @@
         mAdapter.changeCursor(mCursor);
         mAdapter.onBindViewHolder(mViewHolder, 0);
 
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (CompatUtils.isNCompatible()) {
             assertNameIs(mViewHolder, TEST_CACHED_NAME_PRIMARY);
         }
     }
@@ -673,7 +675,7 @@
         if (!TextUtils.isEmpty(number)) {
             values[CallLogQuery.NUMBER] = number;
         }
-        if (!TextUtils.isEmpty(postDialDigits) && PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (!TextUtils.isEmpty(postDialDigits) && CompatUtils.isNCompatible()) {
             values[CallLogQuery.POST_DIAL_DIGITS] = postDialDigits;
         }
         if (presentation != NO_VALUE_SET) {
diff --git a/tests/src/com/android/dialer/calllog/CallLogGroupBuilderTest.java b/tests/src/com/android/dialer/calllog/CallLogGroupBuilderTest.java
index c31c38e..107cf75 100644
--- a/tests/src/com/android/dialer/calllog/CallLogGroupBuilderTest.java
+++ b/tests/src/com/android/dialer/calllog/CallLogGroupBuilderTest.java
@@ -22,6 +22,7 @@
 import android.test.AndroidTestCase;
 import android.test.suitebuilder.annotation.SmallTest;
 
+import com.android.contacts.common.compat.CompatUtils;
 import com.android.dialer.util.AppCompatConstants;
 
 import java.util.List;
@@ -98,7 +99,7 @@
 
         mBuilder.addGroups(mCursor);
 
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (CompatUtils.isNCompatible()) {
             assertEquals(2, mFakeGroupCreator.groups.size());
             assertGroupIs(0, 2, mFakeGroupCreator.groups.get(0));
             assertGroupIs(2, 1, mFakeGroupCreator.groups.get(1));
@@ -380,7 +381,7 @@
         values[CallLogQuery.ID] = mCursor.getPosition();
         values[CallLogQuery.NUMBER] = number;
         values[CallLogQuery.CALL_TYPE] = type;
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (CompatUtils.isNCompatible()) {
             values[CallLogQuery.POST_DIAL_DIGITS] = postDialDigits;
         }
         mCursor.addRow(values);
diff --git a/tests/src/com/android/dialer/calllog/CallLogQueryTestUtils.java b/tests/src/com/android/dialer/calllog/CallLogQueryTestUtils.java
index 1e4a000..f1b1a9a 100644
--- a/tests/src/com/android/dialer/calllog/CallLogQueryTestUtils.java
+++ b/tests/src/com/android/dialer/calllog/CallLogQueryTestUtils.java
@@ -20,13 +20,15 @@
 
 import android.provider.CallLog.Calls;
 
+import com.android.contacts.common.compat.CompatUtils;
+
 /**
  * Helper class to create test values for {@link CallLogQuery}.
  */
 public class CallLogQueryTestUtils {
     public static Object[] createTestValues() {
         Object[] values;
-        if (PhoneNumberDisplayUtil.canShowPostDial()) {
+        if (CompatUtils.isNCompatible()) {
             values = new Object[]{
                     0L, "", 0L, 0L, Calls.INCOMING_TYPE, "", "", "", null, 0, null, null, null,
                     null, 0L, null, 0, Calls.PRESENTATION_ALLOWED, null, null, 0, null, null,