MOB31F
diff --git a/core/build_id.mk b/core/build_id.mk
index 8ae4c9c..72b2472 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=MOB31E
+export BUILD_ID=MOB31F