--- a/configure.sh	Mon Nov 05 23:15:45 2018 +0000
+++ b/configure.sh	Tue Nov 06 03:19:27 2018 +0000
@@ -83,13 +83,15 @@
 		exit 1
 esac
 
-# UI config default based on target
+# UI and RVTMUX config default based on target
 
 if [ "$TARGET" = c11x -o "$TARGET" = c139 -o "$TARGET" = c155 ]
 then
 	UI_CONFIG=84x48
+	RVTMUX_ON_MODEM=1
 else
 	UI_CONFIG=bigcolor
+	RVTMUX_ON_MODEM=0
 fi
 
 # display driver configuration
@@ -209,7 +211,7 @@
 export AMR L1_DYN_DSP_DWNLD L1_VOICE_MEMO_AMR MELODY_E2 SPEECH_RECO
 export DISABLE_SLEEP
 export INIT_blob
-export DSAMPLE_FULL_COLOR UI_CONFIG
+export DSAMPLE_FULL_COLOR RVTMUX_ON_MODEM UI_CONFIG
 export ALLOW_CSIM_GSM SERIAL_DYNAMIC_SWITCH TR_BAUD_CONFIG
 
 SUBDIR=