GL E750 can´t connect to any carrier

Hi,

I can´t connect to any carrier, tried 3 different sim and different protocols, QCM, QMI and 3G
"Sim ist not registered"
I did some updates and firmware downgrade. I tried different AT and

errors in the log file:

Fri Jan 26 10:06:41 2024 daemon.notice netifd: modem_1_1_2 (25975): cat: can't open '/proc/gl-hw-info/sim': No such file or directory
Fri Jan 26 10:06:42 2024 daemon.notice netifd: modem_1_1_2 (25975): Failed to connect to service
Fri Jan 26 10:06:42 2024 daemon.notice netifd: modem_1_1_2 (26430): ./qcm.sh: eval: line 181: can't create : nonexistent directory


Fri Jan 26 11:31:46 2024 daemon.notice netifd: modem_1_1_2 (22960): cat: can't open '/proc/gl-hw-info/sim': No such file or directory
Fri Jan 26 11:31:47 2024 daemon.notice netifd: modem_1_1_2 (22960): Waiting for SIM initialization
Fri Jan 26 11:31:47 2024 daemon.notice netifd: modem_1_1_2 (22960): Failed to connect to service
Fri Jan 26 11:31:47 2024 daemon.notice netifd: modem_1_1_2 (23447): Stopping network modem_1_1_2
Fri Jan 26 11:31:47 2024 daemon.notice netifd: modem_1_1_2 (23447): Command failed: ubus call network.interface notify_proto { "action": 0, "link-up": false, "keep": false, "interface": "modem_1_1_2" } (Permission denied)
Fri Jan 26 11:31:47 2024 daemon.notice netifd: Interface 'modem_1_1_2' is now down
Fri Jan 26 11:31:47 2024 daemon.notice netifd: Interface 'modem_1_1_2' is setting up now
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462): ERROR
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462): ERROR
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:50 2024 daemon.notice netifd: modem_1_1_2 (23462): OK
Fri Jan 26 11:31:51 2024 daemon.notice netifd: modem_1_1_2 (23462): Failed to parse message data
Fri Jan 26 11:31:52 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:52 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:52 2024 daemon.notice netifd: modem_1_1_2 (23462): ERROR
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462): ERROR
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462):
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462): OK
Fri Jan 26 11:31:53 2024 daemon.notice netifd: modem_1_1_2 (23462): cat: can't open '/proc/gl-hw-info/sim': No such file or directory
Fri Jan 26 11:31:55 2024 daemon.notice netifd: modem_1_1_2 (23462): Waiting for SIM initialization
Fri Jan 26 11:31:56 2024 daemon.notice netifd: modem_1_1_2 (23462): Failed to connect to service
Fri Jan 26 11:31:56 2024 daemon.notice netifd: modem_1_1_2 (24011): Stopping network modem_1_1_2
Fri Jan 26 11:31:56 2024 daemon.notice netifd: modem_1_1_2 (24011): Command failed: ubus call network.interface notify_proto { "action": 0, "link-up": false, "keep": false, "interface": "modem_1_1_2" } (Permission denied)
Fri Jan 26 11:31:56 2024 daemon.notice netifd: Interface 'modem_1_1_2' is now down
Fri Jan 26 11:31:56 2024 daemon.notice netifd: Interface 'modem_1_1_2' is setting up now
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020): ERROR
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020): ERROR
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:31:58 2024 daemon.notice netifd: modem_1_1_2 (24020): OK
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020): Failed to parse message data
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020): ERROR
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:32:00 2024 daemon.notice netifd: modem_1_1_2 (24020): ERROR
Fri Jan 26 11:32:01 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:32:01 2024 daemon.notice netifd: modem_1_1_2 (24020):
Fri Jan 26 11:32:01 2024 daemon.notice netifd: modem_1_1_2 (24020): OK
Fri Jan 26 11:32:01 2024 daemon.notice netifd: modem_1_1_2 (24020): cat: can't open '/proc/gl-hw-info/sim': No such file or directory
OpenWRT version:
OpenWrt 22.03.4, r20123-38ccc47687

root@GL-E750:~# cat /sys/kernel/debug/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  2, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 5.10
S:  Manufacturer=Linux 5.10.176 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=1b000000.usb
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480  MxCh= 4
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=05e3 ProdID=0618 Rev=87.54
S:  Product=USB2.0 Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=256ms

T:  Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#=  3 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=05e3 ProdID=0752 Rev= 2.33
S:  Manufacturer=Generic
S:  Product=USB Storage
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 98mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

T:  Bus=01 Lev=02 Prnt=02 Port=01 Cnt=02 Dev#=  5 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=2c7c ProdID=030e Rev= 3.18
S:  Manufacturer=Quectel
S:  Product=Quectel EM05-G
C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=83(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=85(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E:  Ad=87(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
E:  Ad=89(I) Atr=03(Int.) MxPS=   8 Ivl=32ms
E:  Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms