diff --git a/service-t/src/com/android/server/net/NetworkStatsFactory.java b/service-t/src/com/android/server/net/NetworkStatsFactory.java
index 8161f50..e0abdf1 100644
--- a/service-t/src/com/android/server/net/NetworkStatsFactory.java
+++ b/service-t/src/com/android/server/net/NetworkStatsFactory.java
@@ -200,16 +200,6 @@
     }
 
     /**
-     * Parse and return interface-level summary {@link NetworkStats} measured
-     * using {@code /proc/net/dev} style hooks, which may include non IP layer
-     * traffic. Values monotonically increase since device boot, and may include
-     * details about inactive interfaces.
-     */
-    public NetworkStats readNetworkStatsSummaryDev() throws IOException {
-        return mDeps.getNetworkStatsDev();
-    }
-
-    /**
      * Parse and return interface-level summary {@link NetworkStats}. Designed
      * to return only IP layer traffic. Values monotonically increase since
      * device boot, and may include details about inactive interfaces.
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
index cf53002..2575c39 100644
--- a/service-t/src/com/android/server/net/NetworkStatsService.java
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -333,13 +333,11 @@
             }
         }
 
-        Config getDevConfig();
         Config getXtConfig();
         Config getUidConfig();
         Config getUidTagConfig();
 
         long getGlobalAlertBytes(long def);
-        long getDevPersistBytes(long def);
         long getXtPersistBytes(long def);
         long getUidPersistBytes(long def);
         long getUidTagPersistBytes(long def);
@@ -389,8 +387,6 @@
     private final Semaphore mStatsProviderSem = new Semaphore(0, true);
 
     @GuardedBy("mStatsLock")
-    private NetworkStatsRecorder mDevRecorder;
-    @GuardedBy("mStatsLock")
     private NetworkStatsRecorder mXtRecorder;
     @GuardedBy("mStatsLock")
     private NetworkStatsRecorder mUidRecorder;
@@ -844,8 +840,6 @@
             mSystemReady = true;
 
             // create data recorders along with historical rotators
-            mDevRecorder = buildRecorder(PREFIX_DEV, mSettings.getDevConfig(), false, mStatsDir,
-                    true /* wipeOnError */);
             mXtRecorder = buildRecorder(PREFIX_XT, mSettings.getXtConfig(), false, mStatsDir,
                     true /* wipeOnError */);
             mUidRecorder = buildRecorder(PREFIX_UID, mSettings.getUidConfig(), false, mStatsDir,
@@ -943,7 +937,6 @@
         final long currentTime = mClock.millis();
 
         // persist any pending stats
-        mDevRecorder.forcePersistLocked(currentTime);
         mXtRecorder.forcePersistLocked(currentTime);
         mUidRecorder.forcePersistLocked(currentTime);
         mUidTagRecorder.forcePersistLocked(currentTime);
@@ -1010,8 +1003,17 @@
             Log.i(TAG, "Starting import : attempts " + attempts + "/" + targetAttempts);
         }
 
+        // Still create a legacy dev recorder locally but the service doesn't really use it.
+        // This is for backward compatibility where the OEMs might call readPlatformCollection to
+        // perform proprietary operations and relying on the side-effects to complete the follow-up
+        // import process.
+        final NetworkStatsSettings.Config devConfig =
+                new NetworkStatsSettings.Config(HOUR_IN_MILLIS,
+                15 * DAY_IN_MILLIS, 90 * DAY_IN_MILLIS);
+        final NetworkStatsRecorder devRecorder = buildRecorder(PREFIX_DEV, devConfig,
+                false, mStatsDir, true /* wipeOnError */);
         final MigrationInfo[] migrations = new MigrationInfo[]{
-                new MigrationInfo(mDevRecorder), new MigrationInfo(mXtRecorder),
+                new MigrationInfo(devRecorder), new MigrationInfo(mXtRecorder),
                 new MigrationInfo(mUidRecorder), new MigrationInfo(mUidTagRecorder)
         };
 
@@ -1021,9 +1023,10 @@
             final File legacyBaseDir = mDeps.getLegacyStatsDir();
             // Set wipeOnError flag false so the recorder won't damage persistent data if reads
             // failed and calling deleteAll.
+            // Set DEV legacy recorder as null since the DEV recorder has been removed.
+            // Thus it doesn't need to build DEV legacy recorder for comparing with imported data.
             legacyRecorders = new NetworkStatsRecorder[]{
-                buildRecorder(PREFIX_DEV, mSettings.getDevConfig(), false, legacyBaseDir,
-                        false /* wipeOnError */),
+                null /* dev Recorder */,
                 buildRecorder(PREFIX_XT, mSettings.getXtConfig(), false, legacyBaseDir,
                         false /* wipeOnError */),
                 buildRecorder(PREFIX_UID, mSettings.getUidConfig(), false, legacyBaseDir,
@@ -1040,7 +1043,6 @@
             // commit any data to disk until all are read.
             for (int i = 0; i < migrations.length; i++) {
                 final MigrationInfo migration = migrations[i];
-
                 // Read the collection from platform code, and set fallbacks counter if throws
                 // for better debugging.
                 try {
@@ -1074,6 +1076,7 @@
 
             // Find the latest end time.
             for (final MigrationInfo migration : migrations) {
+                if (PREFIX_DEV.equals(migration.recorder.getCookie())) continue;
                 final long migrationEnd = migration.collection.getEndMillis();
                 if (migrationEnd > migrationEndTime) migrationEndTime = migrationEnd;
             }
@@ -1090,7 +1093,8 @@
             for (final MigrationInfo migration : migrations) {
                 migration.imported = true;
                 migration.recorder.removeDataBefore(migrationEndTime);
-                if (migration.collection.isEmpty()) continue;
+                if (migration.collection.isEmpty()
+                        || PREFIX_DEV.equals(migration.recorder.getCookie())) continue;
                 migration.recorder.importCollectionLocked(migration.collection);
             }
 
@@ -1113,6 +1117,7 @@
             if (migrationEndTime > Long.MIN_VALUE) {
                 try {
                     for (final MigrationInfo migration : migrations) {
+                        if (PREFIX_DEV.equals(migration.recorder.getCookie())) continue;
                         if (migration.imported) {
                             migration.recorder.removeDataBefore(migrationEndTime);
                         }
@@ -1123,6 +1128,7 @@
                     // framework will reboot, and if there are remaining tries, the migration
                     // process will retry, which is fine because it's idempotent.
                     for (final MigrationInfo migration : migrations) {
+                        if (PREFIX_DEV.equals(migration.recorder.getCookie())) continue;
                         migration.recorder.recoverAndDeleteData();
                     }
                 }
@@ -1176,11 +1182,14 @@
     /**
      * Compare imported data with the data returned by legacy recorders.
      *
-     * @return true if the data matches, false if the data does not match or throw with exceptions.
+     * @return true if the data matches or if {@code legacyRecorder} is null, false if the data
+     * does not match or throw with exceptions.
      */
     private boolean compareImportedToLegacyStats(@NonNull MigrationInfo migration,
-            @NonNull NetworkStatsRecorder legacyRecorder) {
+            @Nullable NetworkStatsRecorder legacyRecorder) {
         final NetworkStatsCollection legacyStats;
+        // Skip the recorder that doesn't need to be compared.
+        if (legacyRecorder == null) return true;
         try {
             legacyStats = legacyRecorder.getOrLoadCompleteLocked();
         } catch (Throwable e) {
@@ -1834,7 +1843,6 @@
 
             updatePersistThresholdsLocked();
 
-            mDevRecorder.maybePersistLocked(currentTime);
             mXtRecorder.maybePersistLocked(currentTime);
             mUidRecorder.maybePersistLocked(currentTime);
             mUidTagRecorder.maybePersistLocked(currentTime);
@@ -1950,7 +1958,6 @@
      */
     @GuardedBy("mStatsLock")
     private void updatePersistThresholdsLocked() {
-        mDevRecorder.setPersistThreshold(mSettings.getDevPersistBytes(mPersistThreshold));
         mXtRecorder.setPersistThreshold(mSettings.getXtPersistBytes(mPersistThreshold));
         mUidRecorder.setPersistThreshold(mSettings.getUidPersistBytes(mPersistThreshold));
         mUidTagRecorder.setPersistThreshold(mSettings.getUidTagPersistBytes(mPersistThreshold));
@@ -2230,30 +2237,23 @@
     @GuardedBy("mStatsLock")
     private void recordSnapshotLocked(long currentTime) throws RemoteException {
         // snapshot and record current counters; read UID stats first to
-        // avoid over counting dev stats.
+        // avoid over counting xt stats.
         Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotUid");
         final NetworkStats uidSnapshot = getNetworkStatsUidDetail(INTERFACES_ALL);
         Trace.traceEnd(TRACE_TAG_NETWORK);
         Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotXt");
         final NetworkStats xtSnapshot = readNetworkStatsSummaryXt();
         Trace.traceEnd(TRACE_TAG_NETWORK);
-        Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotDev");
-        final NetworkStats devSnapshot = readNetworkStatsSummaryDev();
-        Trace.traceEnd(TRACE_TAG_NETWORK);
 
-        // Snapshot for dev/xt stats from all custom stats providers. Counts per-interface data
-        // from stats providers that isn't already counted by dev and XT stats.
+        // Snapshot for xt stats from all custom stats providers. Counts per-interface data
+        // from stats providers that isn't already counted by XT stats.
         Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotStatsProvider");
         final NetworkStats providersnapshot = getNetworkStatsFromProviders(STATS_PER_IFACE);
         Trace.traceEnd(TRACE_TAG_NETWORK);
         xtSnapshot.combineAllValues(providersnapshot);
-        devSnapshot.combineAllValues(providersnapshot);
 
-        // For xt/dev, we pass a null VPN array because usage is aggregated by UID, so VPN traffic
+        // For xt, we pass a null VPN array because usage is aggregated by UID, so VPN traffic
         // can't be reattributed to responsible apps.
-        Trace.traceBegin(TRACE_TAG_NETWORK, "recordDev");
-        mDevRecorder.recordSnapshotLocked(devSnapshot, mActiveIfaces, currentTime);
-        Trace.traceEnd(TRACE_TAG_NETWORK);
         Trace.traceBegin(TRACE_TAG_NETWORK, "recordXt");
         mXtRecorder.recordSnapshotLocked(xtSnapshot, mActiveIfaces, currentTime);
         Trace.traceEnd(TRACE_TAG_NETWORK);
@@ -2333,13 +2333,11 @@
         // persist any pending data depending on requested flags
         Trace.traceBegin(TRACE_TAG_NETWORK, "[persisting]");
         if (persistForce) {
-            mDevRecorder.forcePersistLocked(currentTime);
             mXtRecorder.forcePersistLocked(currentTime);
             mUidRecorder.forcePersistLocked(currentTime);
             mUidTagRecorder.forcePersistLocked(currentTime);
         } else {
             if (persistNetwork) {
-                mDevRecorder.maybePersistLocked(currentTime);
                 mXtRecorder.maybePersistLocked(currentTime);
             }
             if (persistUid) {
@@ -2396,30 +2394,25 @@
         final long currentTime = mClock.millis();
 
         NetworkTemplate template;
-        NetworkStats.Entry devTotal;
         NetworkStats.Entry xtTotal;
         NetworkStats.Entry uidTotal;
 
         // collect mobile sample
         template = new NetworkTemplate.Builder(MATCH_MOBILE).setMeteredness(METERED_YES).build();
-        devTotal = mDevRecorder.getTotalSinceBootLocked(template);
         xtTotal = mXtRecorder.getTotalSinceBootLocked(template);
         uidTotal = mUidRecorder.getTotalSinceBootLocked(template);
 
         EventLog.writeEvent(LOG_TAG_NETSTATS_MOBILE_SAMPLE,
-                devTotal.rxBytes, devTotal.rxPackets, devTotal.txBytes, devTotal.txPackets,
                 xtTotal.rxBytes, xtTotal.rxPackets, xtTotal.txBytes, xtTotal.txPackets,
                 uidTotal.rxBytes, uidTotal.rxPackets, uidTotal.txBytes, uidTotal.txPackets,
                 currentTime);
 
         // collect wifi sample
         template = new NetworkTemplate.Builder(MATCH_WIFI).build();
-        devTotal = mDevRecorder.getTotalSinceBootLocked(template);
         xtTotal = mXtRecorder.getTotalSinceBootLocked(template);
         uidTotal = mUidRecorder.getTotalSinceBootLocked(template);
 
         EventLog.writeEvent(LOG_TAG_NETSTATS_WIFI_SAMPLE,
-                devTotal.rxBytes, devTotal.rxPackets, devTotal.txBytes, devTotal.txPackets,
                 xtTotal.rxBytes, xtTotal.rxPackets, xtTotal.txBytes, xtTotal.txPackets,
                 uidTotal.rxBytes, uidTotal.rxPackets, uidTotal.txBytes, uidTotal.txPackets,
                 currentTime);
@@ -2721,7 +2714,12 @@
 
             pw.println("Dev stats:");
             pw.increaseIndent();
-            mDevRecorder.dumpLocked(pw, fullHistory);
+            pw.println("Pending bytes: ");
+            if (fullHistory) {
+                pw.println("Complete history:");
+            } else {
+                pw.println("History since boot:");
+            }
             pw.decreaseIndent();
 
             pw.println("Xt stats:");
@@ -2781,7 +2779,6 @@
                 mActiveIfaces);
         dumpInterfaces(proto, NetworkStatsServiceDumpProto.ACTIVE_UID_INTERFACES,
                 mActiveUidIfaces);
-        mDevRecorder.dumpDebugLocked(proto, NetworkStatsServiceDumpProto.DEV_STATS);
         mXtRecorder.dumpDebugLocked(proto, NetworkStatsServiceDumpProto.XT_STATS);
         mUidRecorder.dumpDebugLocked(proto, NetworkStatsServiceDumpProto.UID_STATS);
         mUidTagRecorder.dumpDebugLocked(proto,
@@ -2916,14 +2913,6 @@
                 });
     }
 
-    private NetworkStats readNetworkStatsSummaryDev() {
-        try {
-            return mStatsFactory.readNetworkStatsSummaryDev();
-        } catch (IOException e) {
-            throw new IllegalStateException(e);
-        }
-    }
-
     private NetworkStats readNetworkStatsSummaryXt() {
         try {
             return mStatsFactory.readNetworkStatsSummaryXt();
@@ -3232,12 +3221,8 @@
             return false;
         }
         @Override
-        public Config getDevConfig() {
-            return new Config(HOUR_IN_MILLIS, 15 * DAY_IN_MILLIS, 90 * DAY_IN_MILLIS);
-        }
-        @Override
         public Config getXtConfig() {
-            return getDevConfig();
+            return new Config(HOUR_IN_MILLIS, 15 * DAY_IN_MILLIS, 90 * DAY_IN_MILLIS);
         }
         @Override
         public Config getUidConfig() {
@@ -3248,10 +3233,6 @@
             return new Config(2 * HOUR_IN_MILLIS, 5 * DAY_IN_MILLIS, 15 * DAY_IN_MILLIS);
         }
         @Override
-        public long getDevPersistBytes(long def) {
-            return def;
-        }
-        @Override
         public long getXtPersistBytes(long def) {
             return def;
         }
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
index d7c90d8..13a6a6f 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -2198,7 +2198,7 @@
 
     private NetworkStatsCollection getLegacyCollection(String prefix, boolean includeTags) {
         final NetworkStatsRecorder recorder = makeTestRecorder(mLegacyStatsDir, prefix,
-                mSettings.getDevConfig(), includeTags, false);
+                mSettings.getXtConfig(), includeTags, false);
         return recorder.getOrLoadCompleteLocked();
     }
 
@@ -2255,14 +2255,9 @@
     }
 
     private void mockNetworkStatsSummary(NetworkStats summary) throws Exception {
-        mockNetworkStatsSummaryDev(summary.clone());
         mockNetworkStatsSummaryXt(summary.clone());
     }
 
-    private void mockNetworkStatsSummaryDev(NetworkStats summary) throws Exception {
-        doReturn(summary).when(mStatsFactory).readNetworkStatsSummaryDev();
-    }
-
     private void mockNetworkStatsSummaryXt(NetworkStats summary) throws Exception {
         doReturn(summary).when(mStatsFactory).readNetworkStatsSummaryXt();
     }
@@ -2293,13 +2288,11 @@
         doReturn(false).when(mSettings).getCombineSubtypeEnabled();
 
         final Config config = new Config(bucketDuration, deleteAge, deleteAge);
-        doReturn(config).when(mSettings).getDevConfig();
         doReturn(config).when(mSettings).getXtConfig();
         doReturn(config).when(mSettings).getUidConfig();
         doReturn(config).when(mSettings).getUidTagConfig();
 
         doReturn(MB_IN_BYTES).when(mSettings).getGlobalAlertBytes(anyLong());
-        doReturn(MB_IN_BYTES).when(mSettings).getDevPersistBytes(anyLong());
         doReturn(MB_IN_BYTES).when(mSettings).getXtPersistBytes(anyLong());
         doReturn(MB_IN_BYTES).when(mSettings).getUidPersistBytes(anyLong());
         doReturn(MB_IN_BYTES).when(mSettings).getUidTagPersistBytes(anyLong());