Phone · Samsung · Galaxy S21 FE
Samsung Galaxy S21 FE Microphone Repair
Microphone Repair guide for the Samsung Galaxy S21 FE
Before you begin
Tools
- Phillips #00 screwdriver
- Precision screwdriver set
- Plastic opening tools
- Anti-static wrist strap
- Tweezers
- Suction handle
- Heat gun or iOpener
- Spudger
- SIM eject tool
Parts / materials
- Samsung Galaxy S21 FE replacement sub-board
- Pre-cut back cover replacement adhesive
- Isopropyl alcohol (90%+)
- Lint-free microfiber cloth
Safety
- Discharge the phone battery below 25% before starting to avoid thermal runaway risks.
- Wear eye protection when heating and prying plastic and metal components.
- Wear an anti-static wrist strap grounded to an unpainted metal surface to prevent ESD damage.
- Work in a ventilated area when cleaning adhesive with isopropyl alcohol.
Overview
Step-by-step
- 1
Power off the phone
1 minPress and hold the power and volume down buttons, then select Power Off on the screen. Ensure the device is completely powered down before proceeding.
- 2
Eject the SIM card tray
1 minInsert a SIM eject tool or paperclip into the hole next to the SIM tray at the bottom edge. Push inward to pop out the tray and set it aside.
- 3
Heat the back cover
3 minApply a heated iOpener or heat gun along the perimeter of the back cover for two minutes. This softens the strong adhesive holding the plastic back panel.
- 4
Attach a suction handle
2 minPlace a suction cup near the bottom edge of the back panel. Press down firmly to create a seal and pull upward to form a small gap.
- 5
Slice the perimeter adhesive
4 minInsert an opening pick into the gap created by the suction cup. Slide the pick around all four edges to slice through the adhesive layer.
- 6
Remove the back panel
2 minLift the rear plastic panel off the chassis carefully. Set it face down on a clean surface to prevent dust from accumulating on the adhesive.
- 7
Unscrew the top motherboard bracket
4 minUse a Phillips #00 screwdriver to remove the 15 screws securing the upper motherboard cover and wireless charging coil.
- 8
Detach the wireless charging coil
2 minUse tweezers or a spudger to gently pry up the wireless charging pad and upper bracket assembly, then lift it away from the frame.
- 9
Unscrew the loudspeaker assembly
3 minRemove the 7 Phillips #00 screws holding the lower speaker module in place over the sub-board.
- 10
Pry out the loudspeaker module
2 minInsert a spudger into the pry notch on the corner of the loudspeaker housing. Lift the speaker module out and set it aside.
- 11
Disconnect the flex cables
2 minUse the flat end of a spudger to snap off the display flex cable and main interconnect flex cable connectors from the daughterboard.
- 12
Remove the sub-board retaining screw
1 minLocate and remove the single Phillips #00 screw securing the microphone daughterboard to the lower aluminum frame.
- 13
Remove the microphone daughterboard
2 minGently pry underneath the sub-board with a spudger to free it from the lower housing. Swap in the replacement board containing the primary microphone.
After your Samsung Galaxy S21 FE microphone repair
Power the Galaxy S21 FE back on and test the microphone repair 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 S21 FE 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 S21 FE repair context in the encyclopedia, or open related DIY guides.
