Please try below (skip dns resolution)

wget 
http://193.63.62.31/sites/default/files/publications/civic_renewal_forms.zip

From: Filip Kubicz <filip.kub...@tier.app>
Sent: Friday, 15 July 2022 6:29 PM
To: Amol Lad <amol....@4rf.com>
Cc: modemmanager-devel@lists.freedesktop.org; Kamil Sroka <kamil.sr...@tier.app>
Subject: Re: Linux system cannot use the data connection

Hi Amol,

# wget http://speedtest.ftp.otenet.gr/files/test10Mb.db
--1970-01-04 01:06:40--  http://speedtest.ftp.otenet.gr/files/test10Mb.db
Resolving speedtest.ftp.otenet.gr... failed: Temporary failure in name 
resolution.
wget: unable to resolve host address 
'speedtest.ftp.otenet.gr<http://speedtest.ftp.otenet.gr>'

Filip


On Fri, Jul 15, 2022 at 2:52 PM Amol Lad 
<amol....@4rf.com<mailto:amol....@4rf.com>> wrote:
Please also try downloading a test file as below and see the result. Does it 
download any file at all?

wget http://speedtest.ftp.otenet.gr/files/test10Mb.db



From: Filip Kubicz <filip.kub...@tier.app<mailto:filip.kub...@tier.app>>
Sent: Friday, 15 July 2022 5:28 PM
To: Amol Lad <amol....@4rf.com<mailto:amol....@4rf.com>>
Cc: 
modemmanager-devel@lists.freedesktop.org<mailto:modemmanager-devel@lists.freedesktop.org>;
 Kamil Sroka <kamil.sr...@tier.app<mailto:kamil.sr...@tier.app>>
Subject: Re: Linux system cannot use the data connection

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.

Filip


On Fri, Jul 15, 2022 at 1:28 PM Amol Lad 
<amol....@4rf.com<mailto:amol....@4rf.com>> wrote:
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

From: ModemManager-devel 
<modemmanager-devel-boun...@lists.freedesktop.org<mailto:modemmanager-devel-boun...@lists.freedesktop.org>>
 On Behalf Of Filip Kubicz
Sent: Friday, 15 July 2022 4:14 PM
To: 
modemmanager-devel@lists.freedesktop.org<mailto:modemmanager-devel@lists.freedesktop.org>
Cc: Kamil Sroka <kamil.sr...@tier.app<mailto:kamil.sr...@tier.app>>
Subject: Linux system cannot use the data connection

Hi!

I'm using ModemManager 1.18.6 with Quectel EG21-G modem and Twilio SuperSIM.

This setup works ok on multiple devices.
However, on a few devices, I see following situation:

• 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
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?

Kind regards,
Filip
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