Added ModemManager

net-misc/modemmanager/files/0001-mm-broadband-modem-improve-voice-capabilities-detect.patch

@@ -0,0 +1,25 @@
+From 2091ac5f75a6e025be896c21179b04bc53ce4bb0 Mon Sep 17 00:00:00 2001
+From: Arnaud Ferraris <arnaud.ferraris@gmail.com>
+Date: Sat, 23 May 2020 17:14:36 +0200
+Subject: [PATCH] mm-broadband-modem: improve voice capabilities detection
+
+---
+ src/mm-broadband-modem.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/mm-broadband-modem.c b/src/mm-broadband-modem.c
+index fdbd13b0..6dadb90e 100644
+--- a/src/mm-broadband-modem.c
++++ b/src/mm-broadband-modem.c
+@@ -7400,7 +7400,7 @@ modem_voice_check_support (MMIfaceModemVoice *self,
+ 
+     /* Check ATH support */
+     mm_base_modem_at_command (MM_BASE_MODEM (self),
+-                              "H",
++                              "I",
+                               3,
+                               FALSE,
+                               (GAsyncReadyCallback)ath_format_check_ready,
+-- 
+2.26.2
+