Tried restarting the phone several times, but no luck. Also searched online and made setting change in APN. Still no luck.

I am using Indian bought realme 5i mobile phone. All settings seems correct to me. Able to use all other SIMs in Germany, only facing issue with o2 prepaid s.

Hello @smit_m,

welcome to our o2 Community 

That is not so nice that you can not start the mobile Data with your Prepaid and the Prepaid S Tarif.

Did you try to restart your smartphone?

Do you get a certain error message when trying to connect to the Internet?

Best Regards,

Gerrit

Yes, restarted several times. Also tried changing SIM slots. Not successful. No error message, just not connecting to internet.

Hello @smit_m,

that is already a lot that you tried. Do you have the possibility to try tthe SIM card with another smartphone?

Could you check with our live-check whether there is a disturbance at your address?

Best Regards,

Gerrit

Hello @smit_m,

could you try with another smartphone in the meantime?

Regards,

Gerrit