From: Lars Poeschel <poeschel(a)lemonage.de&gt; The Quectel EC21 modem does not understand the AT+CPSB command, and we did not find a suitable replacement in the Quectel_EC25&EC21_AT_Commands_Manual_V1.3.pdf AT+CPSB gives an error on this modem, so we just skip it. --- drivers/atmodem/gprs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/atmodem/gprs.c b/drivers/atmodem/gprs.c index b637f733..d829e2e6 100644 --- a/drivers/atmodem/gprs.c +++ b/drivers/atmodem/gprs.c @@ -624,6 +624,8 @@ static void gprs_initialized(gboolean ok, GAtResult *result, gpointer user_data) g_at_chat_send(gd->chat, "AT#PSNT=1", none_prefix, NULL, NULL, NULL); break; + case OFONO_VENDOR_QUECTEL_EC2X: + break; default: g_at_chat_register(gd->chat, "+CPSB:", cpsb_notify, FALSE, gprs, NULL); -- 2.27.0