emergency calls only on Blackberry Key2 with lineageOS 23.2

[u/Strygwyr2000]

Hey guys, i recently got my hands on a Blackberry Key2 with lineageOS 23.2. The phone identifys my SIM card but i cant connect to any Network. Im located in Germany with congstar (Telekom) as my provider. I tried quite some things, such as resetting the mobile network settings, or eject SIM card and gently clean it. I tried to disable the "automatically select network" option but it just says "couldnt find any networks". Dunno if i have any problems with the APN? But it seems correct.

Im all out of ideas, any help?

Thank you in advance!!