LTE Router not working with T-Mobile

Hello,
We have a Mikrotik LTE Router Chateau LTE12 (RBD53G-5HacD2HnD-TC&EG12-EA). It works with a Sim Card from other operators in Germany, but not with T-Mobile (Telekom). I insert the Sim Card, it shows Telekom.de as an operator, it takes an ip address, shows the signal but there is no internet. I insert the same Sim Card into other LTE Router such as FritzBox, then it works. I added manually APN settings of T-Mobile, but it didn’t help. Is there someone that faced this problem and solved it? Thanks in advance.

is the ip address ipv4 or ipv6?

Thank you for your reply. It is Auto. Just in case, I have chosen IPv4, but it didn’t help either.

Did TMobile authorize that device for that sim?

I have found some carriers don’t care where there sim ends up… But some do.

Hello forum,
I have the same problem here with a wAP LTE kit, network operator is Germany: congstar in the network of t-mobile, tariff: Homespot. the LTE interface gets an IP in 10.x.x.x or
37.x.x.c range, depends on which APN is set (internet.telekom or internet.t-d1.de). it seems like the network operator does not allow the mikrotik LTE device!
greetings nitana

Hi guys,
i have the same problem. I can not get the mikrotik LTE18 working with german telekom sim. I am getting an IP adress but no data flowing.

Wolfgang

After hours of tries to get running a Telekom Sim Card I found this solution in the Mikrotik servicedesk (https://help.mikrotik.com/servicedesk/). Then the LTE was running without Problems! Copy and paste the last two lines to the terminal.

Problem

No internet connection, not desired APN is used or the LTE interface receives an incorrect IP address.
Solution

By default MBIM modems use the networks provided APN ignoring the manually set one. With some SIM cards the modem can receive an unexpected APN from the network. To resolve this add use-network-apn=no to the APN profile.

CLI commands to accomplish this (replace “internet” with your APN):

/interface lte apn add apn=internet use-network-apn=no
/interface lte set lte1 apn-profiles=internet