GL-SFT1200 - 4G Modem

I’ve just received my GL-SFT1200 router and a E3372 4g dongle but its not detected as USB modem on the router.

I assume from reading a few posts and from testing the dongle in a laptop I have the Hi version as it appears as an ethernet port.

The dongle I have appears to be a rebranded one as its not Huawei web interface but branded ZOWEE and is totally locked down with no apparent way to change settings or ip address etc.

Is there a quick and easy way to get this to work?

If not can anyone recommend an alternative 4G dongle I can get from Amazon Uk and I will just send this one back.


Ive installed luci and can see this in the log when 4g stick is connected. How do i make sure its detected correctly?

Fri Mar 24 03:14:12 2023 user.notice relay: Reloading relay due to ifup-failed of tethering ()
Fri Mar 24 03:14:12 2023 kernel: [ 3626.641586] usb-storage 1-1:1.0: USB Mass Storage device detected
Fri Mar 24 03:14:12 2023 kernel: [ 3626.649226] scsi host0: usb-storage 1-1:1.0
Fri Mar 24 03:14:13 2023 kern.notice kernel: [ 3627.688734] scsi 0:0:0:0: CD-ROM Linux File-Stor Gadget 0310 PQ: 0 ANSI: 2
Fri Mar 24 03:14:13 2023 user.notice relay: Reloading relay due to ifdown of tethering (usb0)

I have never used a branded dongle on my Gl.Inet products, but for my SFT1200, I picked up an EC25-AF (as little as $30 on ebay) and a mini-PCIe to USB WWAN enclosure ($20 on Amazon) and have had a good experience with it being reliable enough for day-to-day needs (it has always connected and is easy to troubleshoot).

I picked up a USB 3.0 to m.2 dongle on Amazon and have been meaning to test some Snapdragon X20 WWAN cards to see if they work well with OpenWRT/Gl.Inet, but also have been waiting to see what 4G/LTE cards they release with the X3000 and newer cellular models. I may just upgrade to one of the newer cellular routers when the time comes and don’t really need 5G NR for anything in particular (the 5G m.2 card is $250/$300, so we should see that at $100 as more 5G NR WWAN cards work through the inventory).

I initially upgraded to a Spitz and then got an Opal with the EC25-AF in an enclosure that have been covering my on-the-go connectivity needs perfectly for a few years now. The external enclosure with 2x external LTE antennas has proved useful several times already. It was also plug-and-play with the Opal (or any other hardware) for the most part.

Adding LTE to any Gl.Inet device is very inexpensive and easy nowadays.

Thanks I will order the parts and try this route.

I’m in the United States, but make sure the LTE bands are compatible with your ISP in the United Kingdom.

EC25-AF - B2/B4/B5/B12/B13/B14/B66/B71

E3372 (found on Amazon) - B1/B3/B7/B8/B20/B28

They have other models of the EC25 for various regions available.

Sorry, I overlooked that you were in the UK.

Hi I have a EC25 now any idea where I can get the drivers from for Windows?

Drivers are included in this zip file.

Thanks very much, all up and running now.

Hey, I bought a Quectel EM12-G, seeing that it has openwrt support and installed kmod-usb-net-qmi-wwan4.14.90-1,kmod-usb-serial-wwan4.14.90-1 & wwan modules. The modem on USB is not detected in GL-SFT1200, but Verizon worked in windows pc already, without installing any drivers. Where to start debugging in this case?