Index: device/inoco/sb30/BoardConfig.mk
===================================================================
--- device/inoco/sb30/BoardConfig.mk
+++ device/inoco/sb30/BoardConfig.mk
@@ -16,6 +16,9 @@
 endif
 BOARD_FLASH_BLOCK_SIZE := 4096
 
+#build timestamp
+BUILD_NUMBER := $(shell date +%s)
+
 # Add path of project sepolicy folder
 BOARD_SEPOLICY_DIRS += \
 	device/inoco/$(MTK_TARGET_PROJECT)/sepolicy