In the following steps you will be releasing the clips holding the phone's cases together. However, the back case is also secured with an adhesive pad. After separating the clips you will use an iOpener to allow the case to fully open. Do not attempt to fully open the phone before loosening the adhesive.

Insert a plastic opening tool into the seam between the front and rear covers near the SIM card slot.

Slide the plastic opening tool along the seam toward the upper corner.