Back of iPhone cracked while using apple case.

Apple is unlikely to cover accidental damage, absent AppleCare+ coverage and a service fee.

For repair info, see iPhone Repair - Official Apple Support

Daruster1 wrote:

Hello, I recently dropped my phone in a silicone apple case abd was wondering if apple gives me a new one as it was in the case and still cracked.

Does the case provide a warranty to cover this?

Silicone cases are not typically a good option for preventing damage when the phone is dropped.

Accidental damage is not covered by Apple Care.