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D-Link DWM-222 SIM Adapter uitzoeken

7 min read

ID: I202603211417
Status: idea
Tags: communication, SIM-card

D-Link DWM-222 SIM Adapter uitzoeken

Bought from amazon

The D-Link DWM-222 SIM Adapter supposedly allows you to SMS and use internet on any device.

I am only trying to get SMS working, so this might help you also fix your data, but maybe not.

The steps I took

Below is a list of the steps I took to get where I have gotten.

Things I havenā€™t tried yet

  • using another SIM
  • using another SD card
  • using without SD card
  • using Windows

Finding device information

As you can see in the included manual, me, a Linux did not get the Set-up wizard. And my led is red. So that is interesting. Cause it is a prepaid SIM-card that I did test in a phone. (it has 20 euros of calling on it), and I was able to sms on it and to it.

These are the steps I did to find out how to work with it. Since I deleted my windows partition a while ago.

I ran sudo dmesg | tail -20 to check recently added devices, and got:

usb 1-3: Product: Mobile Connect
usb 1-3: Manufacturer: Mobile Connect
usb 1-3: SerialNumber: 0123456789ABCDEF
rndis_host 1-3:1.0 usb0: register 'rndis_host' at usb-0000:0e:00.0-3, RNDIS device, c2:ee:32:9d:c7:d0
usb-storage 1-3:1.2: USB Mass Storage device detected
scsi host6: usb-storage 1-3:1.2
rndis_host 1-3:1.0 enxc2ee329dc7d0: renamed from usb0

So then I did a search for the IP Addresses of enxc2ee329dc7d0 with this command ip route | grep enxc2ee329dc7d0, and that returned:

default via 192.168.125.1 dev enxc2ee329dc7d0 proto dhcp src 192.168.125.37 metric 101 
192.168.125.0/24 dev enxc2ee329dc7d0 proto kernel scope link src 192.168.125.37 metric 101

From this we found out that it was running on 192.168.125.1, so I did a Nmap scan: nmap -p 80,8080,8888 192.168.125.1, and this was the response:

Starting Nmap 7.94SVN ( https://nmap.org ) at 2026-03-21 13:31 CET
Nmap scan report for _gateway (192.168.125.1)
Host is up (0.0011s latency).

PORT     STATE  SERVICE
80/tcp   open   http
8080/tcp closed http-proxy
8888/tcp closed sun-answerbook

Nmap done: 1 IP address (1 host up) scanned in 0.03 seconds

And then I thought, letā€™s just open it as an weburl: http://192.168.125.1/ and found out it has indeed a website.

Web interface

Setup Wizard

From there I could open a setup wizard. This setup wizard has 3 tabs:

Connection settings:

  • APN Selection Mode - A dropdown with manual and auto
    • Manual turns APN into a textfield, and adds a new item to the from: APN Method - Dropdown with None, PAP, CHAP and Auto (PAP & CHAP)
  • Allow Data Roaming - A toggle
  • APN - An empty dropdown
  • User Name - textfield
  • Password - textfield

So I filled in:

  • Selection Mode: Manual
  • Roaming: False
  • APN: en.lebara.mobi, I got this from this lebara page
  • APN Method: Auto (PAP & CHAP)

I left the Username and password fields empty.

Admin settings This is just a translation option.

Apply settings

  1. Please check all settings in this wizard again before you click ā€˜Applyā€™.
  2. After applied new settings, you system will need to reboot.

lol

After clicking apply, I got a message device is rebooting, please wait 90s.

After those 90s, my led was still blinking red.

Then I changed the APN to multimedia.lebara.nl since apparently I took the french one. And this website has all the dutch APNs.

After those 90s, my led was still blinking red.

PIN management

In the website, I clicked the internet button. and then clicked the SIM Card PIN Lock tab. Here I entered my PUK Number, and just changed my pin to another number.

But then I got SIM unblock fail., and this is not because of a wrong PUK, cause that gave a different error when I made a typo.

So, the fact that resetting the PIN with the PUK doesnā€™t work, and that there isnā€™t an ā€œunlockā€ option for the sim in the website, that sounds like this is not the issue, or the website assumes it shouldā€™ve already been unlocked beforehand?

Other settings

I tried changing the PLMN mode to manual, but then it got stuck on searching Operators...,

I tried setting Preferred Cellular to 4G Mode in the Connection mode settings, and afterwards running the setup wizard again. Didnā€™t fix it.

More research

I have firmware version 3.0.1EUR on my D-Link DWM-222 (hardware revision A3). This is a recent version that switched the device to RNDIS mode only, which exposes it as a network adapter rather than a modem. This is why Iā€™m not getting serial ports and cannot access SMS functionality on Linux. I learned this from this post on the Arch Linux forums, where the user found another forum where they talked about the downgrade.

I found older firmware versions available on dlink their german FTP website.

But this is a plausable issue, it doesnā€™t explain why the data doesnā€™t work, and why the it is flashing red, cause this above explenation would only be a plausable explenation if it was just the SMS not working

Windows

it can also be that itā€™d just be fixed if I were running Windows. So guess Iā€™ll be reinstalling a windows partition onto my pc. This means, killing my current arch installation. :3

After making me hate myself and reinstalling windows, and installing obsidian n stuff so that I can function, I plugged it in again, and it was still flashing red. so windows was not the issue.

But wait, I was wrong. I opened my file explorer and saw files:

So I tried running StartModem, that removed the disk from my pc. It also added a shortcut to my desktop leading to, you guessed it: http://192.168.125.1/index.html It is still flashing red.

I tried unplugging and replugging, that added back the disk for a few seconds, and then it disappeared again, after opening the page in my browser.

This isnā€™t fixing anything.

I tried putting my own SIM in it, But it is still flashing red.

Alas I tried taking out the SD card. Still flashing red.

Conclusion

No matter which SIM, no matter which SD, no matter the OS, the led keeps blinking red. And the only error I have really seen throughout is when trying to open the SMS page on the website, and the error message never changed:

Get sms center number failed!

References

Graph View

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