diff --git a/java/com/android/dialer/assisteddialing/ConcreteCreator.java b/java/com/android/dialer/assisteddialing/ConcreteCreator.java
index 5236ea8..a3c96db 100644
--- a/java/com/android/dialer/assisteddialing/ConcreteCreator.java
+++ b/java/com/android/dialer/assisteddialing/ConcreteCreator.java
@@ -39,7 +39,7 @@
 public final class ConcreteCreator {
 
   // Floor set at N due to use of Optional.
-  protected static final int BUILD_CODE_FLOOR = Build.VERSION_CODES.N;
+  @VisibleForTesting public static final int BUILD_CODE_FLOOR = Build.VERSION_CODES.N;
   // Ceiling set at O_MR1 because this feature will ship as part of the framework in P.
   @VisibleForTesting public static final int BUILD_CODE_CEILING = Build.VERSION_CODES.O_MR1;
 
diff --git a/java/com/android/dialer/precall/impl/AssistedDialAction.java b/java/com/android/dialer/precall/impl/AssistedDialAction.java
index dc25109..77c9327 100644
--- a/java/com/android/dialer/precall/impl/AssistedDialAction.java
+++ b/java/com/android/dialer/precall/impl/AssistedDialAction.java
@@ -21,19 +21,24 @@
 import android.os.Build;
 import android.os.Bundle;
 import android.telecom.PhoneAccount;
+import android.telephony.SubscriptionInfo;
 import android.telephony.TelephonyManager;
 import com.android.dialer.assisteddialing.AssistedDialingMediator;
 import com.android.dialer.assisteddialing.ConcreteCreator;
 import com.android.dialer.assisteddialing.TransformationInfo;
 import com.android.dialer.callintent.CallIntentBuilder;
 import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
 import com.android.dialer.compat.telephony.TelephonyManagerCompat;
+import com.android.dialer.configprovider.ConfigProvider;
+import com.android.dialer.configprovider.ConfigProviderBindings;
 import com.android.dialer.precall.PreCallAction;
 import com.android.dialer.precall.PreCallCoordinator;
+import com.android.dialer.telecom.TelecomUtil;
 import com.android.dialer.util.CallUtil;
 import java.util.Optional;
 
-/** Rewrites the call URI with country code. TODO(erfanian): use phone account for multi SIM */
+/** Rewrites the call URI with country code. */
 public class AssistedDialAction implements PreCallAction {
 
   @Override
@@ -48,12 +53,14 @@
     if (!builder.isAssistedDialAllowed()) {
       return;
     }
+
     AssistedDialingMediator assistedDialingMediator =
         ConcreteCreator.createNewAssistedDialingMediator(
-            context.getSystemService(TelephonyManager.class), context);
+            getAssistedDialingTelephonyManager(context, builder), context);
     if (Build.VERSION.SDK_INT > ConcreteCreator.BUILD_CODE_CEILING) {
       builder.getOutgoingCallExtras().putBoolean(TelephonyManagerCompat.USE_ASSISTED_DIALING, true);
     }
+    // Checks the platform is N+ and meets other pre-flight checks.
     if (!assistedDialingMediator.isPlatformEligible()) {
       return;
     }
@@ -74,6 +81,47 @@
     }
   }
 
+  /**
+   * A convenience method to return the proper TelephonyManager in possible multi-sim environments.
+   */
+  @SuppressWarnings("AndroidApiChecker") // Use of createForSubscriptionId
+  @TargetApi(Build.VERSION_CODES.N)
+  private TelephonyManager getAssistedDialingTelephonyManager(
+      Context context, CallIntentBuilder builder) {
+
+    ConfigProvider configProvider = ConfigProviderBindings.get(context);
+    TelephonyManager telephonyManager = context.getSystemService(TelephonyManager.class);
+    // None of this will be required in the framework because the PhoneAccountHandle
+    // is already mapped to the request in the TelecomConnection.
+    if (builder.getPhoneAccountHandle() == null) {
+      return telephonyManager;
+    }
+
+    if (!configProvider.getBoolean("assisted_dialing_dual_sim_enabled", false)) {
+      return telephonyManager;
+    }
+
+    com.google.common.base.Optional<SubscriptionInfo> subscriptionInfo =
+        TelecomUtil.getSubscriptionInfo(context, builder.getPhoneAccountHandle());
+    if (!subscriptionInfo.isPresent()) {
+      LogUtil.i(
+          "AssistedDialAction.getAssistedDialingTelephonyManager", "subcriptionInfo was absent.");
+      return telephonyManager;
+    }
+    TelephonyManager pinnedtelephonyManager =
+        telephonyManager.createForSubscriptionId(subscriptionInfo.get().getSubscriptionId());
+    if (pinnedtelephonyManager == null) {
+      LogUtil.i(
+          "AssistedDialAction.getAssistedDialingTelephonyManager",
+          "createForSubscriptionId pinnedtelephonyManager was null.");
+      return telephonyManager;
+    }
+    LogUtil.i(
+        "AssistedDialAction.getAssistedDialingTelephonyManager",
+        "createForPhoneAccountHandle using pinnedtelephonyManager from subscription id.");
+    return pinnedtelephonyManager;
+  }
+
   @Override
   public void runWithUi(PreCallCoordinator coordinator) {
     runWithoutUi(coordinator.getActivity(), coordinator.getBuilder());