Phone · Samsung · Galaxy S21 Plus
Samsung Galaxy S21 Plus Microphone Repair
Microphone Repair guide for the Samsung Galaxy S21 Plus
Before you begin
Tools
- Heat gun or iOpener
- Suction cup
- Opening picks
- Phillips #00 screwdriver
- Plastic spudger
- SIM eject tool
- Precision tweezers
Parts / materials
- Replacement sub-board with microphone
- Pre-cut rear cover adhesive sticker
- Isopropyl alcohol (99%)
Safety
- Wear eye protection when heating glass panels to prevent injury from accidental shattering.
- Do not bend or puncture the battery while working near the lower internal frame.
- Keep heating tools at a safe distance to avoid melting plastic internal components.
Overview
Step-by-step
- 1
Power Down Device
1 minTurn off your Samsung Galaxy S21 Plus completely by holding the Power and Volume Down buttons, then select Power Off.
- 2
Eject SIM Card Tray
1 minInsert a SIM eject tool into the hole on the bottom edge of the frame and press firmly to pop out the SIM tray.
- 3
Heat Rear Glass
3 minApply a heated iOpener or heat gun to the edges of the back cover for two minutes to soften the internal adhesive.
- 4
Attach Suction Handle
2 minPlace a suction cup on the lower portion of the rear glass and pull upward to create a small gap.
- 5
Slice Rear Adhesive
4 minInsert an opening pick into the gap and carefully slide it around the perimeter to cut through the adhesive tape.
- 6
Detach Rear Cover
2 minLift the rear glass cover off the frame and set it aside on a clean, soft surface.
- 7
Unscrew Wireless Charging Antenna
3 minRemove the five Phillips #00 screws securing the wireless charging coil and upper bracket to the frame.
- 8
Remove Wireless Coil
2 minDisconnect the wireless charging ribbon cable from the mainboard and peel the coil off the battery.
- 9
Unscrew Loudspeaker Module
2 minRemove the five Phillips #00 screws holding the lower speaker assembly in place.
- 10
Remove Loudspeaker
2 minPry up the loudspeaker module using a plastic spudger and lift it out of the chassis.
- 11
Disconnect Sub-Board Cables
2 minUse the flat end of a spudger to disconnect the display flex cable and main interconnect cable from the daughterboard.
- 12
Unscrew Daughterboard
1 minRemove the single Phillips #00 screw securing the sub-board to the bottom housing.
- 13
Remove Sub-Board Assembly
2 minGently pry up and remove the daughterboard, which houses the primary microphone and USB-C port.
- 14
Install Replacement Board
2 minAlign the new daughterboard containing the replacement microphone into the housing and press it firmly into position.
After your Samsung Galaxy S21 Plus microphone repair
Power the Galaxy S21 Plus 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 Plus 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 Plus repair context in the encyclopedia, or open related DIY guides.
