diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 42be756..aca603a 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -1371,6 +1371,7 @@
                     }
                     if (!teardown(otherNet)) {
                         loge("Network declined teardown request");
+                        teardown(thisNet);
                         return;
                     }
                 }
@@ -1420,6 +1421,19 @@
                 handleApplyDefaultProxy(netType);
                 addDefaultRoute(mNetTrackers[netType]);
             } else {
+                // many radios add a default route even when we don't want one.
+                // remove the default interface unless we need it for our active network
+                if (mActiveDefaultNetwork != -1) {
+                    LinkProperties linkProperties =
+                            mNetTrackers[mActiveDefaultNetwork].getLinkProperties();
+                    LinkProperties newLinkProperties =
+                            mNetTrackers[netType].getLinkProperties();
+                    String defaultIface = linkProperties.getInterfaceName();
+                    if (defaultIface != null &&
+                            !defaultIface.equals(newLinkProperties.getInterfaceName())) {
+                        removeDefaultRoute(mNetTrackers[netType]);
+                    }
+                }
                 addPrivateDnsRoutes(mNetTrackers[netType]);
             }
         } else {