Thank you Dubai Stu for trying. That did not seem to work.

I received a quick reply from iphone trip with this reply below, and also a different email indicating to remove and reinsert sim after 10 min.

"Please be informed that you have selected Europe plan for your trip and Berlin is not included in the coverage countries for destination Europe.

However you may change your plan by sending us a request.

If you have any further questions please do revert.

Thank you for considering iPhoneTrip"