Enable both SIP INFO & RFC 2833 for DTMFs

app/src/main/assets/linphonerc_default

@@ -11,6 +11,8 @@ sip_tcp_port=-1
 sip_tls_port=-1
 media_encryption=none
 update_presence_model_timestamp_before_publish_expires_refresh=1
+use_rfc2833=1
+use_info=1
 
 [net]
 #Because dynamic bitrate adaption can increase bitrate, we must allow "no limit"

app/src/main/java/org/linphone/core/CoreContext.kt

@@ -455,6 +455,10 @@ class CoreContext @UiThread constructor(val context: Context) : HandlerThread("C
                     )
                 }
 
+                Log.i("$TAG Making sure both RFC2833 & SIP INFO are enabled for DTMFs")
+                core.useRfc2833ForDtmf = true
+                core.useInfoForDtmf = true
+
                 // Add that flag back, was disabled for a time during dev process
                 core.config.setBool("misc", "hide_empty_chat_rooms", true)
             }