diff --git a/src/modems/hayes.c b/src/modems/hayes.c
index 4fc9020..5014f68 100644
--- a/src/modems/hayes.c
+++ b/src/modems/hayes.c
@@ -784,7 +784,8 @@ static char * _request_attention(ModemPlugin * modem, ModemRequest * request)
 						request->authenticate.password);
 			break;
 		case MODEM_REQUEST_CALL:
-			if((p = request->call.number) != NULL
+			if(request->call.call_type == MODEM_CALL_TYPE_VOICE
+					&& (p = request->call.number) != NULL
 					&& (len = strlen(p)) > 2
 					&& p[0] == '*' && p[len - 1] == '#')
 				return _request_attention_call_ussd(modem,
diff --git a/src/plugins/ussd.c b/src/plugins/ussd.c
index 3b1734d..8ae7982 100644
--- a/src/plugins/ussd.c
+++ b/src/plugins/ussd.c
@@ -266,7 +266,7 @@ static void _ussd_on_settings_send(gpointer data)
 #endif
 	memset(&request, 0, sizeof(request));
 	request.type = MODEM_REQUEST_CALL;
-	request.call.call_type = MODEM_CALL_TYPE_DATA;
+	request.call.call_type = MODEM_CALL_TYPE_VOICE;
 	request.call.number = codes[i].number;
 	helper->request(helper->phone, &request);
 }