Here are the typical steps to fix a cracked or shattered iPhone back glass panel:

1. Turn off the phone and remove any case. Heat the back lightly with a hairdryer to soften the adhesive holding the glass.
2. Use a suction cup to create separation between the back glass and frame. Insert a thin metal pry tool to carefully widen the gap.
3. Once fully separated, gently lift off the cracked glass panel. Make sure to detach any fingerprint sensor cables still attached.
4. Thoroughly clean the phone body and remove any leftover adhesive. Prep the replacement glass panel.
5. Apply new adhesive strips or UV gel around the frame. Carefully align and set the replacement glass panel.
6. Press firmly to adhere the new panel and push out any air bubbles. Wipe away excess adhesive.
7. Reconnect any detached cables for features like wireless charging or fingerprint sensor.
8. Allow several hours for the adhesive to fully cure before using the phone.

For Sydney residents needing iPhone back glass repair on an iPhone 8 or newer, Mobile Repair Doctor provides reliable service using high quality OEM parts and precision techniques. Their experienced technicians can efficiently replace just the back glass to restore your iPhone.