Xiaomi 12 Loudspeaker Replacement - Xiaomi Mi 12

Step 1 | Loosen the rear glass adhesive

A charged battery may catch fire if damaged during repair.

Allow your phone's battery to fully drain before starting repairs.

Unplug all cables and shut down the phone completely.

Apply an iOpener to the rear glass for two minutes to loosen the adhesive underneath.

Be careful not to overheat the phone, as it can cause heat damage to the display or internal battery. Alternative heating methods include a hair dryer, heat gun, or hot plate.

Step 2 | Insert an opening pick

Creating a gap in the rear glass requires significant force due to strong adhesive.

Apply more heat if necessary before attempting to create a gap.
For badly cracked rear glass, apply clear packing tape for suction handle adherence.

As a last resort, superglue the suction handle to the broken rear glass.

Position the suction handle on the bottom edge of the rear glass, as close to the edge as possible.
Pull up on the suction handle with strong, steady force to create a gap between the rear glass and frame.

Insert an opening pick at the charging port location once a gap is achieved.

Step 3 | Slice the bottom edge adhesive

Never push the pick deeper than 4mm to prevent damage.

Position the pick at the bottom right corner of the rear glass, cutting its adhesive.
Hold the pick in place to stop resealing.

Step 4 | Insert a second opening pick

Insert a second opening pick at the bottom right corner.

Slide the pick towards the bottom left corner of the rear glass.
Use this pick to slice the adhesive and keep it in place.

Do not remove the pick, as the adhesive may reseal otherwise.

Step 5 | Slice the left edge adhesive

Apply heat to the adhesive for 1-2 minutes using an iOpener, a hair dryer, or a heat gun if it's hard to cut.

Insert an opening pick under the bottom left corner of the rear glass.
Slide the pick along the left edge to slice the adhesive.
Leave the pick in the top left corner to prevent resealing of the adhesive.

Step 6 | Slice the top edge adhesive

Insert a fourth opening pick at the top left corner of the rear glass.

Slide the opening pick along the top edge to slice the adhesive.
Leave the pick in place in the top right corner to prevent resealing.

Step 7 | Slice the right edge adhesive

Insert a fifth opening pick at the top right corner of the rear glass, then carefully move it down to the bottom right corner to separate any remaining adhesive.

Step 8 | Remove the rear glass

Remove the rear glass.

If the rear glass remains stuck to the frame, use an opening pick to slide it around the entire perimeter until separation is complete.
During reassembly:

Power on your phone and test all functions before sealing it up. Power down completely afterwards.
Apply pre-cut adhesive or double-sided tape to secure the rear glass, having first cleaned the relevant areas with high-concentration isopropyl alcohol (>90%) and a lint-free cloth.

After installing the rear glass, apply strong, steady pressure for several minutes to form a good bond. A stack of heavy books can be used for this purpose.

Step 9 | Loosen the charging coil assembly

Avoid damaging the interconnect cable underneath the charging coil.

Insert a pick under the bottom right corner of the charging coil to separate the adhesive.
Slide the pick toward the charging port to complete separation.
Repeat for the bottom left corner, taking care not to damage the interconnect cable.

Step 10 | Remove the indicator sticker

Remove the orange water damage indicator sticker that covers a screw on the top edge of the motherboard cover.

Pierce through the sticker with a screwdriver or carefully use tweezers to remove it.

Step 11 | Unfasten the flash connector cover

Use a Phillips screwdriver to remove the four 5.4 mm screws holding the flash connector cover in place.

Step 12 | Remove the flash connector cover

Remove the flash connector cover using either tweezers or your fingers.

Step 13 | Disconnect the flash

Use the flat end of a spudger to gently pry up and release the flash press connector.

Step 14 | Unfasten the motherboard cover screws

Remove the motherboard cover using a Phillips screwdriver.

Remove five black 5.4mm screws.
Remove two silver 4.4mm screws.

Step 15 | Pry up the motherboard cover

Locate the plastic clips holding the motherboard cover in place.

Be careful not to damage the clips or the surrounding area.

Insert an opening pick under the bottom right corner of the motherboard cover and pry it up.
Slide the pick along the right edge to release more plastic clips.
Twist the pick to fully release the remaining clips.

Step 16 | Remove the motherboard cover

Remove the motherboard cover.

The charging coil is attached; it will be lifted with the motherboard cover.

Step 17 | Disconnect the battery cables

Disconnect both battery cables using a spudger's flat end. Pry the connectors straight up from their sockets.

Step 18 | Remove the indicator sticker

Remove the orange water damage indicator sticker by piercing through it with your screwdriver or using tweezers.

Step 19 | Unfasten the loudspeaker

Remove the screws securing the loudspeaker using a Phillips screwdriver.

The screws are 7 in total and each measures 3.4 mm long.

Step 20 | Pry up the loudspeaker

Insert the flat end of a spudger under the top edge of the loudspeaker.

Careful not to damage the speaker cone.

Pry upwards gently to release the clips securing it to the frame.

Step 21 | Remove the loudspeaker

Remove the loudspeaker.