<div dir="ltr">Hi Amol, thanks for the answer. I checked that the devices are not hitting the SIM data limit. Moreover, as I mentioned there is some small RX/TX occurring for the device from the operator point of view, but the "ping 8.8.8.8 -I wwan0" does not work. <div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"> Filip</div></div></div> </div> <div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 15, 2022 at 1:28 PM Amol Lad <<a href="mailto:Amol.Lad@4rf.com">Amol.Lad@4rf.com</a>> wrote: </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> <div lang="EN-NZ" style="overflow-wrap: break-word;"> <div class="gmail-m_2484207066349224601WordSection1"> I generally run into similar situation when my SIM card runs out of money. Do you want to try topping-up SIM card and see if ping is successful? Amol <div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0cm 0cm"> From: ModemManager-devel <<a href="mailto:modemmanager-devel-bounces@lists.freedesktop.org" target="_blank">modemmanager-devel-bounces@lists.freedesktop.org</a>> On Behalf Of Filip Kubicz Sent: Friday, 15 July 2022 4:14 PM To: <a href="mailto:modemmanager-devel@lists.freedesktop.org" target="_blank">modemmanager-devel@lists.freedesktop.org</a> Cc: Kamil Sroka <<a href="mailto:kamil.sroka@tier.app" target="_blank">kamil.sroka@tier.app</a>> Subject: Linux system cannot use the data connection </div> <div> <div> <div> <div> Hi! I'm using ModemManager 1.18.6 with Quectel EG21-G modem and Twilio SuperSIM. </div> <div> This setup works ok on multiple devices. However, on a few devices, I see following situation: </div> · Modem registered to operator network (e.g. Vodafone UK) · Modem reports connected state · wwan0 interface has IPv4 address · Network provider sees no issues · in Network provider console you can see the device exchanges a few hundred kB of data every hour · but ping doesn’t work · sending data fails </div> This looks strange, as if ModemManager was not aware of the data session that is setup, or Linux system not being able to use it. The simplified flow of using the modem: - enable modem - wait until it auto-registers - create a bearer and connect - when bearer obtains IP address, configure the network interface I attached relevant mmcli information from the device (modem, bearer) and debug level logs from 2 situations: - device stable in connected state (but ping fails) - modem reset - sequence of enable, register, connect -> goes into the same state where ping does not work. I also attached the commands that are used for setting up the network interface when a new IP address is obtained. What should I check, or do you know how to avoid this situation? </div> <div> <div> <div> Kind regards, Filip </div> </div> </div> </div> </div> <hr> The information in this email communication (inclusive of attachments) is confidential to 4RF Limited and the intended recipient(s). If you are not the intended recipient(s), please note that any use, disclosure, distribution or copying of this information or any part thereof is strictly prohibited and that the author accepts no liability for the consequences of any action taken on the basis of the information provided. If you have received this email in error, please notify the sender immediately by return email and then delete all instances of this email from your system. 4RF Limited will not accept responsibility for any consequences associated with the use of this email (including, but not limited to, damages sustained as a result of any viruses and/or any action or lack of action taken in reliance on it). </div> </blockquote></div>