Hello,I got a new sim card O2. I activated it and it was working fine. Now after I restarted my phone, it is asking for a PIN and says SIM locked. Unfortunately, I don't have the SIM kit and I don't speak much German. 

I can't solve my problem via Hotline as I don't speak German.

Can you help me?

Hi!

You can find the new PIN and PUK in “Mein o2”

Postpaid: https://www.o2online.de/goto/tarif-pin/ 
Prepaid: https://www.o2online.de/ecare-prepaid/pin-puk-einsehen

You can find them on the sim holder too

I have lost the SIM holder. 

And the online link says 

Kein Zutritt zu diesem Bereich.

Leider haben Sie keinen Zutritt zu diesem Bereich. Das kann verschiedene Ursachen haben:
Möglicherweise sind Sie Kunde eines Service-Providers und haben daher nur eingeschränkten Zutritt zum O2 Portal.
Weitere Services zu Ihrem Vertrag bietet Ihnen Ihr Service-Provider.

Are you logged into Mein o2 with your phone number?

No. I didn’t complete my registration with mobile number yet 

Hey @soumya.das09, 

welcome to the o2 Community. 

Nice to see, that @TBCMagic have had some tipps for you. 

So what is the current state? Have you found your SIM holder?

Kind regards, Tatjana