--- a/doc/Host-tools-overview	Sat Nov 18 18:02:42 2017 +0000
+++ b/doc/Host-tools-overview	Sun Nov 19 21:45:12 2017 +0000
@@ -50,6 +50,12 @@
 		phones that exercises their peripheral hardware: LCD, keypad
 		backlight, buzzer and vibrator.
 
+c1xx-calextr	This utility extracts the factory RF calibration values for
+		Mot C1xx phones from the records contained in a special sector
+		of their flash and converts them to FreeCalypso format, to be
+		used when running our own firmware on these phones.  See the
+		Compal-calibration article for more details.
+
 ctracedec	GSM firmwares built in TI's Windows environment (official ones
 		as well as our own hacks based on the TCS211 semi-src) have a
 		"compressed trace" misfeature whereby many of the ASCII strings