diff --git a/core/Makefile b/core/Makefile
index 18135d3..b3c3970 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -214,6 +214,7 @@
 			DATE="$(DATE_FROM_FILE)" \
 			BUILD_NUMBER="$(BUILD_NUMBER_FROM_FILE)" \
 			BOARD_BUILD_SYSTEM_ROOT_IMAGE="$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)" \
+			AB_OTA_UPDATER="$(AB_OTA_UPDATER)" \
 			PLATFORM_VERSION="$(PLATFORM_VERSION)" \
 			PLATFORM_SECURITY_PATCH="$(PLATFORM_SECURITY_PATCH)" \
 			PLATFORM_BASE_OS="$(PLATFORM_BASE_OS)" \
diff --git a/core/product_config.mk b/core/product_config.mk
index ad3b518..6aefa8d 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -117,7 +117,7 @@
   # which really means TARGET_PRODUCT=dream make installclean.
   ifneq ($(filter-out $(INTERNAL_VALID_VARIANTS),$(TARGET_BUILD_VARIANT)),)
     MAKECMDGOALS := $(MAKECMDGOALS) $(TARGET_BUILD_VARIANT)
-    TARGET_BUILD_VARIANT := eng
+    TARGET_BUILD_VARIANT := userdebug
     default_goal_substitution :=
   else
     default_goal_substitution := $(DEFAULT_GOAL)
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 8b9bdba..af5f516 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -104,7 +104,7 @@
   # Can be an arbitrary string, but must be a single word.
   #
   # If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-  PLATFORM_SECURITY_PATCH := 2015-12-01
+  PLATFORM_SECURITY_PATCH := 2016-03-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"
diff --git a/target/product/core.mk b/target/product/core.mk
index 2992dbd..065474d 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -34,7 +34,6 @@
     DownloadProviderUi \
     Email \
     ExactCalculator \
-    Exchange2 \
     ExternalStorageProvider \
     FusedLocation \
     InputDevices \
diff --git a/target/product/sdk_phone_arm64.mk b/target/product/sdk_phone_arm64.mk
index a0cf6c1..1d13b9e 100644
--- a/target/product/sdk_phone_arm64.mk
+++ b/target/product/sdk_phone_arm64.mk
@@ -24,7 +24,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic_arm64/device.mk)
 
 # Overrides
-PRODUCT_BRAND := generic_arm64
+PRODUCT_BRAND := Android
 PRODUCT_NAME := sdk_phone_arm64
 PRODUCT_DEVICE := generic_arm64
 PRODUCT_MODEL := Android SDK built for arm64
diff --git a/target/product/sdk_phone_armv7.mk b/target/product/sdk_phone_armv7.mk
index aeb4940..a0fa049 100644
--- a/target/product/sdk_phone_armv7.mk
+++ b/target/product/sdk_phone_armv7.mk
@@ -17,6 +17,6 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/sdk_base.mk)
 
 # Overrides
-PRODUCT_BRAND := generic
+PRODUCT_BRAND := Android
 PRODUCT_NAME := sdk_phone_armv7
 PRODUCT_DEVICE := generic
diff --git a/target/product/sdk_phone_mips.mk b/target/product/sdk_phone_mips.mk
index 818491f..d7217a0 100644
--- a/target/product/sdk_phone_mips.mk
+++ b/target/product/sdk_phone_mips.mk
@@ -22,7 +22,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/sdk_base.mk)
 
 # Overrides
-PRODUCT_BRAND := generic_mips
+PRODUCT_BRAND := Android
 PRODUCT_NAME := sdk_phone_mips
 PRODUCT_DEVICE := generic_mips
 PRODUCT_MODEL := Android SDK for Mips
diff --git a/target/product/sdk_phone_mips64.mk b/target/product/sdk_phone_mips64.mk
index afdb2a8..8ddcb58 100644
--- a/target/product/sdk_phone_mips64.mk
+++ b/target/product/sdk_phone_mips64.mk
@@ -23,7 +23,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/sdk_base.mk)
 
 # Overrides
-PRODUCT_BRAND := generic_mips64
+PRODUCT_BRAND := Android
 PRODUCT_NAME := sdk_phone_mips64
 PRODUCT_DEVICE := generic_mips64
 PRODUCT_MODEL := Android SDK built for mips64
diff --git a/target/product/sdk_phone_x86.mk b/target/product/sdk_phone_x86.mk
index 95c49ab..a58d26f 100644
--- a/target/product/sdk_phone_x86.mk
+++ b/target/product/sdk_phone_x86.mk
@@ -22,7 +22,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/sdk_base.mk)
 
 # Overrides
-PRODUCT_BRAND := generic_x86
+PRODUCT_BRAND := Android
 PRODUCT_NAME := sdk_phone_x86
 PRODUCT_DEVICE := generic_x86
 PRODUCT_MODEL := Android SDK built for x86
diff --git a/target/product/sdk_phone_x86_64.mk b/target/product/sdk_phone_x86_64.mk
index 69e37af..c39b274 100644
--- a/target/product/sdk_phone_x86_64.mk
+++ b/target/product/sdk_phone_x86_64.mk
@@ -23,7 +23,7 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/sdk_base.mk)
 
 # Overrides
-PRODUCT_BRAND := generic_x86_64
+PRODUCT_BRAND := Android
 PRODUCT_NAME := sdk_phone_x86_64
 PRODUCT_DEVICE := generic_x86_64
 PRODUCT_MODEL := Android SDK built for x86_64
diff --git a/tools/buildinfo.sh b/tools/buildinfo.sh
index ece5103..dcb66bf 100755
--- a/tools/buildinfo.sh
+++ b/tools/buildinfo.sh
@@ -23,6 +23,9 @@
 if [ -n "$BOARD_BUILD_SYSTEM_ROOT_IMAGE" ] ; then
   echo "ro.build.system_root_image=$BOARD_BUILD_SYSTEM_ROOT_IMAGE"
 fi
+if [ -n "$AB_OTA_UPDATER" ] ; then
+  echo "ro.build.ab_update=$AB_OTA_UPDATER"
+fi
 echo "ro.product.model=$PRODUCT_MODEL"
 echo "ro.product.brand=$PRODUCT_BRAND"
 echo "ro.product.name=$PRODUCT_NAME"