diff --git a/Makefile b/Makefile
index df0f8246..33e3ac42 100755
--- a/Makefile
+++ b/Makefile
@@ -81,10 +81,10 @@ DEFINES += U2F_PROXY_MAGIC=\"IOT\"
 DEFINES += HAVE_IO_U2F HAVE_U2F
 
 # Development flags
-APP_LOAD_PARAMS += --path "44'/01'"
-DEFINES += HAVE_BOLOS_APP_STACK_CANARY HAVE_PRINTF PRINTF=screen_printf
+#APP_LOAD_PARAMS += --path "44'/01'"
+#DEFINES += HAVE_BOLOS_APP_STACK_CANARY HAVE_PRINTF PRINTF=screen_printf
 # Release flags
-# DEFINES += BOLOS_RELEASE PRINTF\(...\)=
+DEFINES += BOLOS_RELEASE PRINTF\(...\)=
 
 # Compiler, assembler, and linker
 
@@ -127,3 +127,8 @@ include $(BOLOS_SDK)/Makefile.glyphs
 
 # Import generic rules from the SDK
 include $(BOLOS_SDK)/Makefile.rules
+
+
+
+listvariants:
+	@echo VARIANTS COIN iota
\ No newline at end of file
diff --git a/iota.png b/iota.png
new file mode 100644
index 00000000..fc92fd9e
Binary files /dev/null and b/iota.png differ