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I have an issue with LTE connection via T-Mobile Poland. It happened after last update and now even downgrading FW does not help (before that everything was working on FW 7.0.0).

Router connects to T-Mobile.pl, registers and aggregates 3 bands for LTE but it does not receive any data.

If I force 3G, everything is working.

Tried to push APN manually but does not work as well.

Router is working with other provider: Play

I am also facing same issue, If you found any helpful guide Please let me know. Thanks

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Does your mobile interface have an IP address? You can check it via WebUI by navigating to the Network>Interfaces and checking whether mobile interface has an IPv4 address assigned. If not, I'm leaving a potential solution below:

In the WebUI, navigate to System>CLI and login to the router via CLI (SSH) by entering the following details:

Username: root

Password: <WebUI router password>

Details about logging into device via CLI can also be found on our wiki page here: https://wiki.teltonika-networks.com/view/RUTX14_CLI

Once logged in to the CLI, execute the following commands in order

gsmctl -A at+cgdcont=1 

gsmctl -A at+cgdcont=1,\"ip\"

ubus call gsmd reinit_modems

Once done, the router should obtain its IP address almost immediately. Let me know if this solves your issue.

Best regards,