Telit LE910 failing to find network

Wed Jul 19 12:51:23 UTC 2017

Hi

According to logs shared by Kelvin, the modem seems to be properly replying

Thanks, yes QMI commands seem to be working now but it fails to register on
a network.

I've tried a SIM card for a different network provider now (EE) and the
scan response is:

Jul 19 12:42:44 linaro-gnome ModemManager[802]: <debug> Running
registration checks (CS: 'yes', PS: 'yes', EPS: 'no')
Jul 19 12:42:44 linaro-gnome ModemManager[802]: [/dev/cdc-wdm0] Sent
message...#012<<<<<< RAW:#012<<<<<<   length = 13#012<<<<<<   data   =
01:0C:00:00:03:02:00:36:00:24:00:00:00
Jul 19 12:42:44 linaro-gnome ModemManager[802]: [/dev/cdc-wdm0] Sent
message (translated)...#012<<<<<< QMUX:#012<<<<<<   length  = 12#012<<<<<<
  flags   = 0x00#012<<<<<<   service = "nas"#012<<<<<<   client  =
2#012<<<<<< QMI:#012<<<<<<   flags       = "none"#012<<<<<<   transaction =
54#012<<<<<<   tlv_length  = 0#012<<<<<<   message     = "Get Serving
System" (0x0024)
Jul 19 12:42:44 linaro-gnome ModemManager[802]: [/dev/cdc-wdm0] Received
message...#012>>>>>> RAW:#012>>>>>>   length = 76#012>>>>>>   data   =
01:4B:00:80:03:02:02:36:00:24:00:3F:00:02:04:00:00:00:00:00:
28:01:00:00:27:05:00:EA:00:1E:00:00:26:02:00:89:01:21:05:00:
01:01:00:01:00:15:03:00:01:05:01:12:05:00:EA:00:1E:00:00:11:
01:00:00:10:01:00:01:01:06:00:02:02:02:02:01:05
Jul 19 12:42:44 linaro-gnome ModemManager[802]: [/dev/cdc-wdm0] Received
message (translated)...#012>>>>>> QMUX:#012>>>>>>   length  = 75#012>>>>>>
  flags   = 0x80#012>>>>>>   service = "nas"#012>>>>>>   client  =
2#012>>>>>> QMI:#012>>>>>>   flags       = "response"#012>>>>>>
transaction = 54#012>>>>>>   tlv_length  = 63#012>>>>>>   message     =
"Get Serving System" (0x0024)#012>>>>>> TLV:#012>>>>>>   type       =
"Result" (0x02)#012>>>>>>   length     = 4#012>>>>>>   value      =
00:00:00:00#012>>>>>>   translated = SUCCESS#012>>>>>> TLV:#012>>>>>>
type   = 0x28#012>>>>>>   length = 1#012>>>>>>   value  = 00#012>>>>>>
TLV:#012>>>>>>   type       = "MNC PCS Digit Include Status"
(0x27)#012>>>>>>   length     = 5#012>>>>>>   value      =
EA:00:1E:00:00#012>>>>>>   translated = [ mcc = '234' mnc = '30'
includes_pcs_digit = 'no' ]#012>>>>>> TLV:#012>>>>>>   type       = "UMTS
Primary Scrambling Code" (0x26)#012>>>>>>   length     = 2#012>>>>>>
value      = 89:01#012>>>>>>   translated = 393#012>>>>>> TLV:#012>>>>>>
type       = "Detailed Service Status" (0x21)#012>>>>>>   length     =
5#012>>>>>>   value      = 01:01:00:01:00#012>>>>>>   translated = [ status
= 'limited' capability = 'cs' hdr_status = 'none' hdr_hybrid = 'yes'
forbidden = 'no' ]#012>>>>>> TLV:#012>>>>>>   type       = "Roaming
Indicator List" (0x15)#012>>>>>>   length     = 3#012>>>>>>   value      =
01:05:01#012>>>>>>   translated = { [0] = '[ radio_interface = 'umts'
roaming_indicator = 'off' ] '}#012>>>>>> TLV:#012>>>>>>   type       =
"Current PLMN" (0x12)#012>>>>>>   length     = 5#012>>>>>>   value      =
EA:00:1E:00:00#012>>>>>>   translated = [ mcc = '234' mnc = '30'
description = '' ]#012>>>>>> TLV:#012>>>>>>   type       = "Data Service
Capability" (0x11)#012>>>>>>   length     = 1#012>>>>>>   value      =
00#012>>>>>>   translated = {}#012>>>>>> TLV:#012>>>>>>   type       =
"Roaming Indicator" (0x10)#012>>>>>>   length     = 1#012>>>>>>   value
 = 01#012>>>>>>   translated = off#012>>>>>> TLV:#012>>>>>>   type       =
"Serving System" (0x01)#012>>>>>>   length     = 6#012>>>>>>   value      =
02:02:02:02:01:05#012>>>>>>   translated = [ registration_state =
'not-registered-searching' cs_attach_state = 'detached' ps_attach_state =
'detached' selected_network = '3gpp' radio_interfaces = '{ [0] = 'umts '}' ]
Jul 19 12:42:44 linaro-gnome ModemManager[802]: <debug> Processing 3GPP
info...
Jul 19 12:42:44 linaro-gnome ModemManager[802]: <debug> Modem not yet
registered in a 3GPP network... will recheck soon

The --3gpp-scan is a bit different with this SIM card / network, it shows
'current' for the correct network (EE) and forbidden for the others:

linaro at linaro-gnome:~$ sudo mmcli -m 0 --3gpp-scan --timeout=300

Found 7 networks:
23410 - O2 - UK (lte, forbidden)
23415 - voda UK (lte, forbidden)
23420 - 3 UK (umts, forbidden)
23410 - O2 - UK (umts, forbidden)
23415 - voda UK (gsm, forbidden)
23415 - voda UK (umts, forbidden)
23430 - EE (umts, current)

The SIM card / network I was using earlier looked like this while scanning:

Jul 19 10:07:48 linaro-gnome ModemManager[3663]: <debug>
[1500458868.901761] [mm-iface-modem-3gpp.c:761]
mm_iface_modem_3gpp_run_registration_checks(): Running registration checks
(CS: 'yes', PS: 'yes', EPS: 'no')
Jul 19 10:07:48 linaro-gnome ModemManager[3663]: [/dev/cdc-wdm0] Sent
message...#012<<<<<< RAW:#012<<<<<<   length = 13#012<<<<<<   data   =
01:0C:00:00:03:02:00:2F:00:24:00:00:00
Jul 19 10:07:48 linaro-gnome ModemManager[3663]: [/dev/cdc-wdm0] Sent
message (translated)...#012<<<<<< QMUX:#012<<<<<<   length  = 12#012<<<<<<
  flags   = 0x00#012<<<<<<   service = "nas"#012<<<<<<   client  =
2#012<<<<<< QMI:#012<<<<<<   flags       = "none"#012<<<<<<   transaction =
47#012<<<<<<   tlv_length  = 0#012<<<<<<   message     = "Get Serving
System" (0x0024)
Jul 19 10:07:48 linaro-gnome ModemManager[3663]: [/dev/cdc-wdm0] Received
message...#012>>>>>> RAW:#012>>>>>>   length = 41#012>>>>>>   data   =
01:28:00:80:03:02:02:2F:00:24:00:1C:00:02:04:00:00:00:00:00:
21:05:00:00:01:00:01:00:11:01:00:00:01:06:00:02:02:02:00:01:00
Jul 19 10:07:48 linaro-gnome ModemManager[3663]: [/dev/cdc-wdm0] Received
message (translated)...#012>>>>>> QMUX:#012>>>>>>   length  = 40#012>>>>>>
  flags   = 0x80#012>>>>>>   service = "nas"#012>>>>>>   client  =
2#012>>>>>> QMI:#012>>>>>>   flags       = "response"#012>>>>>>
transaction = 47#012>>>>>>   tlv_length  = 28#012>>>>>>   message     =
"Get Serving System" (0x0024)#012>>>>>> TLV:#012>>>>>>   type       =
"Result" (0x02)#012>>>>>>   length     = 4#012>>>>>>   value      =
00:00:00:00#012>>>>>>   translated = SUCCESS#012>>>>>> TLV:#012>>>>>>
type       = "Detailed Service Status" (0x21)#012>>>>>>   length     =
5#012>>>>>>   value      = 00:01:00:01:00#012>>>>>>   translated = [ status
= 'none' capability = 'cs' hdr_status = 'none' hdr_hybrid = 'yes' forbidden
= 'no' ]#012>>>>>> TLV:#012>>>>>>   type       = "Data Service Capability"
(0x11)#012>>>>>>   length     = 1#012>>>>>>   value      = 00#012>>>>>>
translated = {}#012>>>>>> TLV:#012>>>>>>   type       = "Serving System"
(0x01)#012>>>>>>   length     = 6#012>>>>>>   value      =
02:02:02:00:01:00#012>>>>>>   translated = [ registration_state =
'not-registered-searching' cs_attach_state = 'detached' ps_attach_state =
'detached' selected_network = 'unknown' radio_interfaces = '{ [0] = 'none
'}' ]
Jul 19 10:07:48 linaro-gnome ModemManager[3663]: <debug>
[1500458868.926057] [mm-broadband-modem-qmi.c:4611]
common_process_serving_system_3gpp(): No 3GPP info given...
Jul 19 10:07:48 linaro-gnome ModemManager[3663]: <debug>
[1500458868.927312] [mm-iface-modem-3gpp.c:297]
run_registration_checks_ready(): Modem not yet registered in a 3GPP
network... will recheck soon

And --3gpp-scan on that card showed 'available' for all networks.

Thanks for any hints,
Kelvin.
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