Use a heat gun to apply heat to the front face of the phone. This will soften the adhesive used to secure the phone's battery.

When using a heat gun or hair dryer to soften the adhesive, be careful not to overheat the battery. The hair dryer/heat gun will make the phone hot to the touch, so handle the phone with care.

Alternatively, you can place a heated iOpener across the top of the battery for approximately three minutes to soften the adhesive holding the battery to the device.

If you have multiple iOpeners, it is recommended to also put one on the screen side of the battery.