Co do stabilności to trzeba ocenic, potestować.
Ja czekam cierpliwie do ukończenia poprawnego ustawiania interfejsu LTE wraz z testami.

Z drugiej strony mam na 1043nd z E3132 taką lokalizację, że zewnetrzna antena nie pomaga skacze sygnał z 25 fo 65 %. Jest ustawiony watchdog i były momenty braku połączenia do serwera openvpn. Pomógł reseter wykonany na Wemos D1 pro. Jak nie ma pinga na bramę vpn to na 10s pozbawia router napięcia (Wemos nie potrzebuje dostępu do netu aby zrobić robotę)

Ja poczekam, mam czas, router w dalszym  ciągu jest do Waszej dyspozycji.

EDIT
@Cezary - czy kopia oryginalnego oprogramowania jest potrzebna z opisem wersji.
Mogę wystawić wszystkie zrzucone partycje lub sklejone mts11,mtd12,mtd13

Właśnie miałem pisać, że mam inną zawartość pliku ncm.sh
Teraz @Leo-PL mam coś jeszcze robić ?

@Leo-PL
Kiedy można się spodziewać poprawki do mojego R

Ten na pudelku ma zte mf286 a w info w sofcie ma 286R

Zrestartowany, WAN podłączony

Dioda od Wan miga, co mam rozumieć pod pojęciem złóż wan, (mogę to zrobić po południu) z rana nic nie zdążę
Edit:
Wypiąłem wtyczkę z Portu wan/lan od sieci wewnętrznej

Siedzę i przeglądam log z włączenia połączenia LTE na oryginalnym oprogramowaniu:
Mam coś takiego  może w czymś pomoże:

OnConnectSuccess
RECONNECT_NEW:OnConnectSuccess
RECONNECT_NEW:connected Rndis_RecordTime:Sun Mar 20 00:48:01 2022

Adapter index 6
MAC da:76:63:dd:ab:3d
udhcpc (v1.19.4) started
Executing /etc_ro/udhcpc.sh deconfig
interface=usb0
Entering listen mode: raw
Opening raw socket on ifindex 6
Got raw socket fd 8
Attached filter to raw socket fd 8
Created raw socket
Adapter index 6
MAC da:76:63:dd:ab:3d
Adapter index 6
MAC da:76:63:dd:ab:3d
Adding option: 0x35 01
Adding option: 0x3d 01da7663ddab3d
Adding option: 0x39 0240
Adding option: 0x3c 756468637020312e31392e34
Sending discover...
hlen 6 xid 7714dd23 ciaddr 0 yiaddr 0 siaddr 0 giaddr 0
chaddr da7663ddab3d00000000000000000000
Adapter index 6
MAC da:76:63:dd:ab:3d
Waiting on select...
[   96.300000]
[   96.300000] /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/zte_genl_kernel-1.0/zte_genl_kernel_main.c[197]: INFO:Recv from userspace: [1]
Adapter index 6
MAC da:76:63:dd:ab:3d
Adding option: 0x35 01
Adding option: 0x3d 01da7663ddab3d
Adding option: 0x39 0240
Adding option: 0x3c 756468637020312e31392e34
Sending discover...
hlen 6 xid 7714dd23 ciaddr 0 yiaddr 0 siaddr 0 giaddr 0
chaddr da7663ddab3d00000000000000000000
Adapter index 6
MAC da:76:63:dd:ab:3d
Waiting on select...
Got valid DHCP packet
hlen 6 xid 7714dd23 ciaddr 0 yiaddr 6452fd35 siaddr 6452fdca giaddr 0
chaddr da7663ddab3d00000000000000000000
Option found: 0x35 02
Option found: 0x36 6452fdca
Adapter index 6
MAC da:76:63:dd:ab:3d
Adapter index 6
MAC da:76:63:dd:ab:3d
Adding option: 0x35 03
Adding option: 0x3d 01da7663ddab3d
Adding option: 0x32 6452fd35
Adding option: 0x36 6452fdca
Adding option: 0x39 0240
Adding option: 0x3c 756468637020312e31392e34
Sending select for 100.82.253.53...
hlen 6 xid 7714dd23 ciaddr 0 yiaddr 0 siaddr 0 giaddr 0
chaddr da7663ddab3d00000000000000000000
Adapter index 6
MAC da:76:63:dd:ab:3d
Waiting on select...
Got valid DHCP packet
hlen 6 xid 7714dd23 ciaddr 0 yiaddr 6452fd35 siaddr 6452fdca giaddr 0
chaddr da7663ddab3d00000000000000000000
Option found: 0x35 05
Option found: 0x33 00001c20
Lease of 100.82.253.53 obtained, lease time 7200
Option found: 0x01 ffffff00
Option found: 0x03 6452fdca
Option found: 0x06 d4026034d4027ffe
Option found: 0x0f 6c616e
Option found: 0x1c 6452fdff
Option found: 0x33 00001c20
Option found: 0x35 05
Option found: 0x36 6452fdca
Option found: 0x3a 00000e10
Option found: 0x3b 0000189c
Option found: 0x01 ffffff00
Option found: 0x03 6452fdca
Option found: 0x06 d4026034d4027ffe
Option found: 0x0f 6c616e
Option found: 0x1c 6452fdff
Option found: 0x33 00001c20
Option found: 0x36 6452fdca
Option found: 0x35 05
Option found: 0x3a 00000e10
Option found: 0x3b 0000189c
Executing /etc_ro/udhcpc.sh bound
route: SIOCDELRT: No such process
opms_wan_ifname=usb0
LanIfName=br0
#######start the mtu_set.sh##########
#######end the mtu_set.sh##########
sh: !=: unknown operand
sh: !=: unknown operand
interface=usb0
ip=100.82.253.53
subnet=255.255.255.0
mask=24
router=100.82.253.202
dns=212.2.96.52 212.2.127.254
domain=lan
broadcast=100.82.253.255
lease=7200
serverid=100.82.253.202
siaddr=100.82.253.202
opt53=05
opt58=00000e10
opt59=0000189c
Entering listen mode: none
192.168.0.1255.255.255.0init_dns_ip:tmp_byte_netmask is 0
init_dns_ip:tmp_byte_netmask is 255
init_dns_ip:tmp_byte_netmask is 255
init_dns_ip:tmp_byte_netmask is 255
adb shell date
Sun Mar 20 00:48:09 UTC 2022
496 KB/s (20480 bytes in 0.040s)
3 KB/s (154 bytes in 0.042s)

Edit:
Wcześniej rejestracja interfejsów
cdc_acm 1-1:1.2: This device cannot do calls on its own. It is not a modem.
[   16.900000] cdc_acm 1-1:1.2: ttyACM0: USB ACM device
[   16.900000] usbcore: registered new interface driver cdc_acm
[   16.910000] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[   17.000000] usbcore: registered new interface driver usbserial
[   17.000000] USB Serial support registered for generic
[   17.010000] usbcore: registered new interface driver usbserial_generic
[   17.020000] usbserial: USB Serial Driver core
[   17.070000] Initializing USB Mass Storage driver...
[   17.080000] usbcore: registered new interface driver usb-storage
[   17.080000] USB Mass Storage support registered.
[   17.100000] driver_info->flags 1020 idVendor 19d2 idProduct 1489
[   17.110000] cdc_ether 1-1:1.6: ecm0: register 'cdc_ether' at usb-ehci-platform.0-1, CDC Ethernet Device, ce:38:27:cb:8f:e4
[   17.120000] usbcore: registered new interface driver cdc_ether
[   17.200000] generic_rndis_bind: rx_urb_size: 0x3e80
[   17.210000] generic_rndis_bind: data zero copy=1
[   17.210000] driver_info->flags 3238 idVendor 19d2 idProduct 1489
[   17.220000] rndis_host 1-1:1.0: usb0: register 'rndis_host' at usb-ehci-platform.0-1, RNDIS device, da:76:63:dd:ab:3d
[   17.230000] usbcore: registered new interface driver rndis_host
[   17.290000] USB Serial support registered for GSM modem (1-port)
[   17.300000] usbcore: registered new interface driver option
[   17.310000] option: v0.7.2:USB Driver for GSM modems
[   17.370000] fuse init (API version 7.18)
[   18.160000] yaffs: dev is 32505864 name is "mtdblock8" rw
[   18.170000] yaffs: passed flags ""
[   18.510000] yaffs: dev is 32505871 name is "mtdblock15" rw
[   18.510000] yaffs: passed flags ""
rm: can't remove '/etc_rw/fota/cp_failure_flag': No such file or directory
SOS: FLAG is mtdblock7
SOS: /etc_rw/fota/cfg_partiton_flag has [   19.890000] yaffs: dev is 32505863 name is "mtdblock7" rw
content
[   19.900000] yaffs: passed flags ""
space usage of /etc_rw/config is 28%
[   20.080000] yaffs: dev is 32505866 name is "mtdblock10" rw
[   20.090000] yaffs: passed flags ""
[   20.100000] ath79_spinand_read_page ecc err status=0x2
SOS: /etc_rw/config use mtdblock7, /zte_backup use mtdblock10, now doing backup!
rm: can't remove '/zte_backup/lost+found': Directory not empty
[   22.150000] Load cfg new driver...
[   22.150000] cfg init, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 578
[   22.160000]
[   22.170000] wifi_chip1_ssid2_acc
[   22.170000] 776966695f63686970315f73736964325f616363
[   22.270000]
[   22.270000]  cfg init end, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 637
[   22.290000] cfg init, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 578
[   22.300000]
[   22.300000] TESTBITSIGNINFO=0000
[   22.300000] 544553544249545349474e494e464f3d30303030
[   22.310000]
[   22.310000]  cfg init end, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 637
[   22.320000] cfg init, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 578
[   22.340000] cfg driver error: /etc_rw/inic/cert  open failure, file: /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c, line: 857!
[   22.350000]
[   22.350000]
[   22.360000] 0000000000000000000000000000000000000000
[   22.360000]
[   22.360000]  cfg init end, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 637
[   22.380000] cfg init, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 578
[   22.390000] cfg driver error: /etc_rw/inic/wapi  open failure, file: /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c, line: 857!
[   22.400000]
[   22.410000]
[   22.410000] 0000000000000000000000000000000000000000
[   22.410000]
[   22.410000]  cfg init end, /home/scl/ci/workspace/Soft4_MF286R_TMOPL_CPE/qsdk/build_dir/linux-ar71xx_generic/cfg-1.0/cfg_param.c 637
[   22.450000] usbcore: registered new interface driver cdc_wdm
[   22.880000] usbcore: registered new interface driver qmi_wwan

wysłałem odp.

@Leo-PL - jak się wymienimy kluczami do wireguard.
Skonfigurował bym u siebie i podłączył pod wan router

config interface 'wan'
        option proto 'ncm'
        option device '/dev/ttyACM0'
        option apn 'darmowy'
to otrzymuję (miga na niebiesko wan ale brak utworzonych interfejsów )

Wed Mar 16 17:18:16 2022 daemon.notice netifd: wan (21609): ls: /sys/devices/platform/ahb/1b000000.usb/usb1/1-1/1-1:1.2/../../*/net: No such file or directory
Wed Mar 16 17:18:19 2022 daemon.notice netifd: wan (21609): sending -> AT+CFUN=1
Wed Mar 16 17:18:19 2022 daemon.notice netifd: wan (21609): Configuring modem
Wed Mar 16 17:18:19 2022 daemon.notice netifd: wan (21609): sending -> AT+ZGDCONT=1,"IP","darmowy","",0,0
Wed Mar 16 17:18:21 2022 daemon.notice netifd: wan (21609): sending -> AT+ZGPCOAUTH=1,"","",0
Wed Mar 16 17:18:21 2022 daemon.notice netifd: wan (21609): Starting network wan
Wed Mar 16 17:18:21 2022 daemon.notice netifd: wan (21609): Connecting modem