RUTM51 ISP connection problems

Networking Solutions
1

Hi,

I have a new RUTM51 with the latest available firmware, but it won’t connect to the ISP Orange.
I tested the device with another SIM from a different ISP and that works without any issues.

I’ve already tried setting the APN manually and forcing the connection to 4G only, but that didn’t help.

If anyone has suggestions or knows what could be causing this, please share.

Thanks!

2

Problem Explanation

Since your RUTM51 works fine with a SIM card from another provider, the issue is almost certainly related to Orange’s network settings or restrictions, not the router itself.

Common causes include:

Incorrect APN configuration or Orange requiring specific APN parameters.

SIM card restrictions (not activated for data, blocked, or limited to certain devices).

Network mode mismatch (4G-only may not work in some Orange regions).

Unsupported or weak frequency bands (LTE bands) used by Orange in your area.

SIM PIN lock still enabled.

IMEI restrictions by Orange (rare, but possible).
Suggested Solutions-
-Verify the correct APN for Orange
-Change Network Mode

Instead of forcing 4G-only, try:Auto (2G/3G/4G) or 4G/3G
-Test the SIM in a smartphone
Insert the Orange SIM into a phone:
Does mobile data work?
Is the APN automatically detected?
Does it show 4G, 3G, or no data at all?
If it does not work on a phone, then the SIM itself is the issue.

3

Hi Telal,

Thank you for your input. Unfortunately, I had already tested and checked all of the points you mentioned, and they did not provide a solution or give any further insight into the issue.

As additional information, I can confirm that the SIM works perfectly in a RUT241, so the problem appears to be specific to the RUTM51.

Kind regards,

4

Hi Steven,

If possible,

The RUTM51 log during the connection attempt:
From Status - System - Logs(during the connection attempt, not after).

6

Greetings, @StevenMichielsens,

Thank you for your message,

For troubleshooting purposes, we will require more sensitive information from your end, such as the troubleshoot file, which may contain passwords, public IP addresses, serial numbers, and such. To avoid leaking this information, we have sent you a form to fill out, which you will receive in your e-mail inbox that you have registered your account with in the forums. In the Ticket ID field of the form, please enter the ID of this thread, which is 16469.

Thank you,
V.

1 Like
7

Hi Vilius,

I filled in the form I received by email.
After confirming, I was redirected, but it didn’t seem like anything happened.

Could you please advise on the next steps?

Thanks,

8

Greetings,

Thank you for your message.

I’ve shared additional instructions with you - please check your email inbox, including the spam or junk folder, to ensure you receive them.

If anything is unclear or you don’t see the email, let me know.

Warm regards,
V.

9

This topic was automatically closed after 60 days. New replies are no longer allowed.