diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 93d369c..ebfab96 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -1517,7 +1517,8 @@
             if (DBG_LOC) log("getAllCellInfo: is active user");
             List<CellInfo> cellInfos = new ArrayList<CellInfo>();
             for (Phone phone : PhoneFactory.getPhones()) {
-                cellInfos.addAll(phone.getAllCellInfo());
+                final List<CellInfo> info = phone.getAllCellInfo();
+                if (info != null) cellInfos.addAll(phone.getAllCellInfo());
             }
             return cellInfos;
         } else {