MF286D sim issue

Installing and Using OpenWrt
1

Hi all,

Updating the modem firmware on an MF286D, went from B05 to B12 (incrementally) absolutely fine, but going from B12 to B14 has stopped the sim working.

Looking at the logs, it is saying that the device does not support 802.3 mode and it shuts down the
APN. Log as below.

Sat Mar  1 16:40:32 2025 daemon.notice netifd: ThreeAPN (3565): Waiting for SIM initialization
Sat Mar  1 16:40:33 2025 daemon.notice netifd: ThreeAPN (3565): Failed to parse message data
Sat Mar  1 16:40:33 2025 daemon.notice netifd: ThreeAPN (3565): PIN verification is disabled
Sat Mar  1 16:40:34 2025 daemon.notice netifd: ThreeAPN (3565): Device does not support 802.3 mode. Informing driver of raw-ip only for wwan0 ..
Sat Mar  1 16:40:34 2025 daemon.notice netifd: ThreeAPN (3565): Waiting for network registration
Sat Mar  1 16:40:39 2025 daemon.notice netifd: ThreeAPN (3565): Starting network ThreeAPN
Sat Mar  1 16:40:45 2025 daemon.notice netifd: ThreeAPN (3565): Request timed out
Sat Mar  1 16:40:45 2025 daemon.notice netifd: ThreeAPN (3565): Unable to connect IPv4
Sat Mar  1 16:40:45 2025 daemon.notice netifd: ThreeAPN (3695): Stopping network ThreeAPN
Sat Mar  1 16:40:45 2025 daemon.notice netifd: ThreeAPN (3695): Command failed: ubus call network.interface notify_proto { "action": 0, "link-up": false, "keep": false, "interface": "ThreeAPN" } (Permission denied)
Sat Mar  1 16:40:45 2025 daemon.notice netifd: Interface 'ThreeAPN' is now down
Sat Mar  1 16:40:45 2025 daemon.notice netifd: Interface 'ThreeAPN' is setting up now

Any help on resolving this appreciated.

2

Please show your interface configuration as a fragment of /etc/config/network and also the output of

ati
at+cereg?
at+cgdcont?
at+cgpaddr
3

Here is my interface configuration

config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config interface 'lan'
	option device 'br-lan'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'
	option force_link '0'

config interface 'wan'
	option device 'wan'
	option proto 'dhcp'

config interface 'wan6'
	option device 'wan'
	option proto 'dhcpv6'

config interface 'ThreeAPN'
	option proto 'qmi'
	option device '/dev/cdc-wdm0'
	option apn '3internet'
	option auth 'both'
	option pdptype 'ipv4'
	option delay '5'
	option peerdns '0'
	list dns '8.8.8.8'
	list dns '9.9.9.9'
	option force_link '1'
	option ipv6 '1'

ATI output

Manufacturer: ZTE CORPORATION
Model: MF286DMODULE
Revision: BD_TELIAMF286DV1.0.0B14
SVN: 14
IMEI: 866754046760208
+GCAP: +CGSM

I am just putting a sim back into the device to get the other details.

4

Here are the AT command outputs:

at+cereg?
+CEREG: 0,1

OK

at+cgdcont?
+CGDCONT: 1,"IP","3internet","0.0.0.0",0,0,0,0
+CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 3,"IPV4V6","hos","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 4,"IPV4V6","sos","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1

OK

at+cgpaddr
+CGPADDR: 1,188.29.184.143
+CGPADDR: 2,42.4.74.67.1.58.65.149.0.0.0.0.110.189.63.240
+CGPADDR: 3,0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
+CGPADDR: 4,0.0.0.0,0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0

OK
5

I see no SIM issue. You're registered to the network, have IP assigned, etc.

Remove this. To be on the safe side, increase the delay to 15.

6

Done, but the exact same issue remains. None of the devices connected to the network can access the internet, when I do opkg update on the router I get a list of error messages.

I'm going to try re-installing 24.10.0 firmware and then setup without using any backup config to see if any different - that'll have to wait until tomorrow though as the Mrs is working from home today and is likely to kill me if I keep moving the sim between devices. I'm pretty sure it's not possible to downgrade modem firmware to an earlier version, B12, which I know was working perfectly.

7

What happens if you enable ipv6 on the WAN connection?

8

Actually nothing changed when I disabled IPV6, I scoured a few forums and it seems that modem firmware B14 doesn't work with OpenWRT. I just downgraded back to B12 and everything started working again.

9

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