diff --git a/drivers/atmodem/sms.c b/drivers/atmodem/sms.c
index fde90ba3..f93dd239 100644
--- a/drivers/atmodem/sms.c
+++ b/drivers/atmodem/sms.c
@@ -805,6 +805,7 @@ static gboolean build_cnmi_string(char *buf, int *cnmi_opts,
 	case OFONO_VENDOR_NOVATEL:
 	case OFONO_VENDOR_HUAWEI:
 	case OFONO_VENDOR_ZTE:
+	case OFONO_VENDOR_SIMCOM:
 		/* MSM devices advertise support for mode 2, but return an
 		 * error if we attempt to actually use it. */
 		mode = "1";