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Samsung Galaxy S20 Ultra Back Cover Replacement

Back Cover Replacement guide for the Samsung Galaxy S20 Ultra

Difficult
~35 min
19 steps

Before you begin

Tools

  • Heat gun or hair dryer
  • Suction cup tool
  • Plastic opening picks
  • Spudger tool
  • Tweezers
  • SIM eject tool

Parts / materials

  • Replacement back cover with pre-installed adhesive
  • High-purity isopropyl alcohol (90%+)
  • Lint-free microfiber cloth

Safety

  • Wear safety glasses to protect your eyes from fine glass splinters if the original rear cover is shattered.
  • Do not heat the back of the device above 80°C (176°F) to protect the internal lithium-ion battery.
  • Handle cracked glass edges with care to prevent cuts or puncture wounds.

Overview

# Samsung Galaxy S20 Ultra Back Cover Replacement Repair Guide Action-specific back cover replacement walkthrough for the Samsung Galaxy S20 Ultra. About 35 minutes across 19 steps. This DIY guide walks through back cover replacement on the Samsung Galaxy S20 Ultra (Galaxy S series phone). Before you open the device, confirm the exact model number on the Samsung settings screen or rear housing so your replacement part matches the Galaxy S20 Ultra specifically—not a similar Galaxy S sibling. Most DIY techs finish this Samsung Galaxy S20 Ultra back cover replacement in about 35 minutes when parts and tools are ready. Difficulty is rated advanced for this model. Recommended tools for this Samsung Galaxy S20 Ultra job: Heat gun or hair dryer, Suction cup tool, Plastic opening picks, Spudger tool, Tweezers, SIM eject tool. Parts and supplies: Replacement back cover with pre-installed adhesive, High-purity isopropyl alcohol (90%+), Lint-free microfiber cloth. Power the Galaxy S20 Ultra off completely, remove SIMs/SD cards if present, and work on a clean, well-lit surface with a magnetic mat for screws. If a step feels wrong for your Samsung Galaxy S20 Ultra, stop and compare the connector layout to the photos in this guide. When you prefer a same-day pro repair in Seattle instead, LML Repair can handle back cover replacement for this model with tested parts and a workmanship warranty.

Step-by-step

  1. 1

    Power down the phone

    1 min

    Press and hold the side button and volume down button, then tap 'Power off'. Ensure the phone is completely off before starting.

  2. 2

    Eject the SIM tray

    1 min

    Insert a SIM eject tool or paperclip into the hole at the top edge of the phone. Push firmly until the tray pops out, then remove it.

  3. 3

    Heat the bottom edge

    2 min

    Apply heat to the lower edge of the back glass for 2 minutes using a heat gun. Keep the heat moving to avoid concentrated hotspot damage.

  4. 4

    Attach the suction cup

    1 min

    Press a suction cup firmly onto the lower portion of the rear glass cover. Ensure a tight seal near the bottom edge.

  5. 5

    Create an entry gap

    1 min

    Pull up firmly on the suction cup handle to lift the back glass away from the frame. Look for a tiny gap along the bottom seam.

  6. 6

    Insert an opening pick

    2 min

    Slide a thin plastic opening pick into the gap created between the glass and the phone frame. Leave it in place to keep the gap open.

  7. 7

    Slice bottom adhesive

    2 min

    Slide the opening pick carefully along the bottom edge of the device. Cut through the factory adhesive sealant completely.

  8. 8

    Heat the left edge

    2 min

    Apply heat to the left edge of the phone for 1 to 2 minutes to soften the side adhesive strip.

  9. 9

    Slice left adhesive

    2 min

    Guide the opening pick around the bottom-left corner and up along the left edge. Take care not to insert the pick deeper than 5mm.

  10. 10

    Heat the top edge

    2 min

    Heat the top edge of the rear glass panel for 1 to 2 minutes using your heat source.

  11. 11

    Slice top adhesive

    2 min

    Slide the opening pick around the top-left corner and across the top edge of the phone. Cut through the remaining top adhesive.

  12. 12

    Heat the right edge

    2 min

    Apply heat to the right edge of the rear glass panel for 1 to 2 minutes.

  13. 13

    Slice right adhesive

    2 min

    Guide your pick around the top-right corner and down the right edge. Ensure all perimeter adhesive strips are completely separated.

  14. 14

    Remove the back cover

    1 min

    Lift the rear glass cover straight up and off the phone body. Set the old back panel aside.

  15. 15

    Clean adhesive residue

    5 min

    Dampen a microfiber cloth with isopropyl alcohol and clean off all old adhesive remnants from the frame's edge. Use a plastic spudger to scrape stubborn spots.

  16. 16

    Prep replacement back cover

    1 min

    Peel away the protective clear film covering the pre-installed adhesive strips on the inside of the new back panel.

  17. 17

    Align the new cover

    2 min

    Carefully line up the camera module housing and frame perimeter with the new back glass. Lower the panel into position gently.

  18. 18

    Press down to seal

    3 min

    Apply firm, even pressure along all four edges and around the camera bump for a full minute to seat the new adhesive properly.

  19. 19

    Reinsert the SIM tray

    1 min

    Slide the SIM card tray back into its slot at the top edge of the device until it sits completely flush.

After your Samsung Galaxy S20 Ultra back cover replacement

Power the Galaxy S20 Ultra back on and test the back cover replacement function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Samsung Galaxy S20 Ultra job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.

Keep learning

Explore more Samsung Galaxy S20 Ultra repair context in the encyclopedia, or open related DIY guides.

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