Here is a comment from an Australian reader which involves a broken iPhone where it was impossible to open the SIM card slot:

Upgraded to mobile phone plan with Optus (in Australia) which involved also getting a new iPhone.

The new iPhone SIM card slot didn’t work, it could not be opened to insert the SIM card.

Returned to the store and they refused to replace the handset, additionally after selling a defective product they refused a full refund. The only thing they offered was to return the iPhone to some group called “boomerang”, to possible repair/what-ever.