RUTX50: Mobile EMM reject cause: Network Failure

Networking Solutions Issue
1

Hi Community,

Device: RUTX50
Firmware: RUTX_R_00.07.22.3

I am currently in Sweden, before in Denmark. Roaming is needed. I could not connect to any Danish or Swedish operator. Well, I can connect “somehow” but do not get an Internet connection (see screenshot).

None of the Danish or swedish providers grants access to the Internet I have the impression that there’s some wrong settings on my RUTX50.

Screenshot 2026-05-26 at 17-58-20 RUTX50 - Teltonika Networks
Screenshot 2026-05-26 at 17-58-20 RUTX50 - Teltonika Networks1370×185 7.67 KB

This message pops up in all cases: Mobile EMM reject cause: Network Failure

I am a bit lost.

Cheers, Frank

Add-on: I use a German SIM Card (02) and it works fine in Germany.

2

Does it work if you set the connection to 4G/3G only? If so, upgrade the modem firmware.

3

Thanks for the answer.

I changed the settings to 4G/3G. This did not help.The firmware is the latest (RUTX_R_00.07.22.3).

Cheers, Frank

4

Hi, @FrankJe

@pwhooftman is asking about the modem firmware… not the version of firmare of the rutx50.

You can find this at System > Firmware > Update Firmware > Modem Update.

6

Hi Marcelo,

thanks for your advice. I was not aware that a seperate Modem firmware exists.

When I check what you recommended I found though that the latest Modem firmware is installed (Internal modem firmware version: RG501QEUAAR12A11M4G).

Cheers, Frank

7

Try using the settings below, see if it makes a difference …

NETWORK > MOBILE > GENERAL > SIM configuration > SIM1

Turn off ‘Deny data roaming’

NETWORK > MOBILE > GENERAL > Interface mob1s1a1 APN configuration

Turn off Auto APN and enter your providers details

NETWORK > MOBILE > CONNECTION > SIM1

Set prefered network type to ‘4G only’

NETWORK > WAN > WAN INTERFACES > mob1s1a1

Set PDP type to ‘IPv4’ only (I’m assuming the carrier isn’t an IPv6 only network)

8

I’ll ask an obvious silly question…

Is roaming allowed with the sim you purchased and if so is Denmark and Sweden a part of the group of countries you can use the sim within. I’d contact O2 to find out.

9

Hi akwe-xavante,

that’s a good point. Yes, roaming is allowed. We used the same card before in other countries.

The contract with o2 offers two cards: one in a mobile phone (which I share now as a backup solution) an one data card for routers only.

o2 is a pretty chaotic company and I would not exclude that the problem is on their side.

Next thing for me to do is testing Mike’s advice. I’ll report …

Cheers, Frank

10

Hi Mike,

  1. “Deny data roaming” was turned off already.
  2. When turning off Auto APN I get the option in the field below to choose the provider (o2) plus a line to “Add custom option”. No idea if a custom option is needed. Should I fill in anything – and if: what?
  3. The network type was “4G only” already.
  4. The PDP type was “IPv4 only” already.

The settings you provided lead to an “operator state: denied” state.

Cheers, Frank

11

That’s the result:

Screenshot 2026-06-05 at 10-25-48 RUTX50 - Teltonika Networks
Screenshot 2026-06-05 at 10-25-48 RUTX50 - Teltonika Networks1370×185 7.37 KB

12

First ensure you know your providers (O2 Germany?) APN details … usually in a support area on their website.

Enter in the APN manually.

13

As I left Sweden/Denmark two days ago I am currently not able to do tests. As a result I cannot contact o2 now on my home terrain. I will have to reset the RUTX50 again (how often did I do that now?).

So the issue will appear again next time when I will be in a foreign country. I’ll remember this thread then a keep on posting.

Cheers, Frank