LTE not working on GL.iNET GL-X750

Thank you for everybodies help, I got it working!! :tada:

Not exactly sure what fixed it. I removed the earlier mentioned QMI generated interface and followed instructions for ModemManager https://openwrt.org/docs/guide-user/network/wan/wwan/modemmanager

So I ran this:

opkg update && opkg install kmod-usb-serial kmod-usb-net kmod-usb-serial-wwan kmod-usb-serial-option kmod-usb-net-qmi-wwan kmod-usb-net-cdc-mbim luci-proto-modemmanager

And then followed the screenshot for Luci ModemManager after a reboot and added the newly created BROADBAND interface to wan firewall rule.

As mentioned before, earlier tries with ModemManager failed, possible I installed some missing package. Probably upgrading to latest OpenWRT version and powering off the interface before inserting SIM seems to have helped as well (since at one point those cli commands related to LTE gave no output initially).

And in case it helps anybody, here's the current kernel modules:

root@openwrt:~# lsmod
ath                    18944  4 ath9k,ath9k_common,ath9k_hw,ath10k_core
ath10k_core           445568  1 ath10k_pci
ath10k_pci             36304  0 
ath9k                 103024  0 
ath9k_common           11904  1 ath9k
ath9k_hw              347840  2 ath9k,ath9k_common
cdc_ether               5120  1 cdc_ncm
cdc_mbim                4608  0 
cdc_ncm                15616  1 cdc_mbim
cdc_wdm                 8512  3 cdc_mbim,qmi_wwan
cfg80211              285648  5 ath9k,ath9k_common,ath10k_core,ath,mac80211
cmac                    2304  1 
compat                   992  4 ath9k,ath9k_common,mac80211,cfg80211,[permanent]
crc_ccitt               1664  1 ppp_async
crc32c_generic          1376  1 
drbg                   17536  0 
ehci_fsl                3456  0 
ehci_hcd               38128  2 ehci_platform,ehci_fsl
ehci_platform           4992  0 
fsl_mph_dr_of           3632  0 
gpio_button_hotplug     6592  0 
hmac                    2496  0 
hwmon                   8384  1 ath10k_core
jitterentropy_rng       7136  0 
libcrc32c                592  1 nf_tables
libsha256               8640  1 sha256_generic
mac80211              523424  2 ath9k,ath10k_core
mii                     5152  1 usbnet
nf_conntrack           69104  7 nft_redir,nft_nat,nft_masq,nft_flow_offload,nft_ct,nf_nat,nf_flow_table
nf_defrag_ipv4          1216  1 nf_conntrack
nf_defrag_ipv6          5584  1 nf_conntrack
nf_flow_table          22224  4 nf_flow_table_ipv6,nf_flow_table_ipv4,nf_flow_table_inet,nft_flow_offload
nf_flow_table_inet       576  0 
nf_flow_table_ipv4       448  0 
nf_flow_table_ipv6       448  0 
nf_log_common           2912  2 nf_log_ipv6,nf_log_ipv4
nf_log_ipv4             3584  0 
nf_log_ipv6             3904  0 
nf_nat                 22032  4 nft_redir,nft_nat,nft_masq,nft_chain_nat
nf_reject_ipv4          2560  2 nft_reject_ipv4,nft_reject_inet
nf_reject_ipv6          2880  2 nft_reject_ipv6,nft_reject_inet
nf_tables             148464256 nft_fib_inet,nf_flow_table_ipv6,nf_flow_table_ipv4,nf_flow_table_inet,nft_reject_ipv6,nft_reject_ipv4,nft_reject_inet,nft_reject,nft_redir,nft_quota,nft_objref,nft_numgen,nft_nat,nft_masq,nft_log,nft_limit,nft_hash,nft_flow_offload,nft_fib_ipv6,nft_fib_ipv4,nft_fib,nft_ct,nft_counter,nft_chain_nat
nfnetlink               5152  1 nf_tables
nft_chain_nat            864  2 
nft_counter             1728 24 
nft_ct                  7616  3 
nft_fib                 1376  3 nft_fib_inet,nft_fib_ipv6,nft_fib_ipv4
nft_fib_inet             672  0 
nft_fib_ipv4            2080  1 nft_fib_inet
nft_fib_ipv6            2784  1 nft_fib_inet
nft_flow_offload        3520  0 
nft_hash                2336  0 
nft_limit               3456  5 
nft_log                 1664  0 
nft_masq                1792  1 
nft_nat                 2592  0 
nft_numgen              1440  0 
nft_objref              1664  0 
nft_quota               1952  0 
nft_redir               1760  0 
nft_reject              1120  3 nft_reject_ipv6,nft_reject_ipv4,nft_reject_inet
nft_reject_inet         1152  2 
nft_reject_ipv4          672  0 
nft_reject_ipv6          672  0 
nls_base                4896  1 usbcore
option                 33344  3 
ppp_async               7104  0 
ppp_generic            25008  3 pppoe,ppp_async,pppox
pppoe                   9568  0 
pppox                   1296  1 pppoe
qmi_wwan               16608  0 
seqiv                   1600  0 
sha256_generic          2400  0 
slhc                    5152  1 ppp_generic
usb_common              2736  2 ehci_platform,usbcore
usb_wwan                4512  1 option
usbcore               146400 13 option,cdc_mbim,usb_wwan,qmi_wwan,cdc_ncm,cdc_ether,usbserial,usbnet,cdc_wdm,ehci_platform,ehci_fsl,ehci_hcd
usbnet                 17232  4 cdc_mbim,qmi_wwan,cdc_ncm,cdc_ether
usbserial              17936  8 option,usb_wwan

Feels unreal, this has been a dream setup, finally I can retire the other router and learn more about this marvelous project. Got the LTE indicator working by activating it in System > LED Configuration.

THANK YOU!

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