Ensure the Samsung Galaxy S25 Ultra is completely powered off. Press and hold the power button, then select 'Power Off' on the screen. Wait until the device is fully shut down before proceeding.

Use a heat gun or hairdryer to gently heat the edges of the back cover to soften the adhesive. Carefully use a suction cup to lift the back cover while inserting a plastic opening tool to separate it from the phone. Work slowly around the edges to avoid damaging the cover.

Locate the battery connector and use a spudger to gently pry it off the motherboard. This step is crucial to ensure your safety and prevent any electrical issues during the repair.

Using the Phillips #00 screwdriver, remove all screws securing the mid-frame. Keep track of the screws using a magnetic project mat or by placing them in a safe area.

Heat the edges of the screen using the heat gun or hairdryer. Use the suction cup and plastic opening tools to carefully lift the screen. Be cautious of cables and components beneath the screen.

Remove any adhesive residue from the phone frame using isopropyl alcohol. Align the new screen and secure it with adhesive strips or double-sided tape. Press firmly to ensure good adhesion.

Carefully reconnect the battery and secure the mid-frame with the screws removed earlier. Ensure all components are properly aligned and connected.

Heat the edges of the back cover slightly to reactivate the adhesive. Press the cover firmly onto the phone until it snaps into place securely.

Turn on the device to confirm that the new screen is functioning correctly. Check for touch responsiveness and display clarity.