Redmi Note 12 Power Button Repair

Insert a SIM card eject tool, a SIM eject bit, or a straightened paper clip into the hole on the SIM tray located at the left edge of the phone.

Press directly into the hole to eject the SIM card tray.

Remove the SIM card tray.

The back cover of the Redmi Note 9 is held in place by plastic clips ''and'' adhesive. It might require some force to release the plastic clips.

A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

Secure a suction handle to the bottom edge of the screen, as close to the edge as possible.

If the screen is cracked, the suction handle may not stick. Try [https://d3nevzfk7ii3be.cloudfront.net/igi/4MmKE22Cy2MavVZU|lifting it with strong tape|new_window=true], or superglue the suction handle in place and allow it to cure so you can proceed.

Lift the phone assembly with the suction handle to create a small gap between the assembly and the back cover.

In case you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the [https://www.ifixit.com/Guide/iOpener+Heating/25705|iOpener|new_window=true] instructions to avoid overheating.

Insert an opening pick in a steep angle into the gap you created. This might require some force.

Slide the opening pick to the bottom right corner to slice the adhesive and release the plastic clips holding the back cover in place.

Insert a second opening pick in a steep angle at the bottom edge of your phone.

Slide the opening pick to the bottom left corner to release the plastic clips and to slice the adhesive.

Leave the opening picks in place to prevent the adhesive from resealing.

If the adhesive becomes hard to cut, it has most likely cooled down. [https://www.ifixit.com/Guide/iOpener+Heating/25705|new_window=true|Use your iOpener] to reheat it.

Insert a third opening pick in a steep angle at the bottom left corner of your phone.

Slide the opening pick along the left edge of your phone to release the plastic clips and slice the adhesive.

Leave the opening pick in the top left corner to prevent the adhesive from resealing.

Insert a fourth opening pick in a steep angle at the bottom right corner of your phone.

Slide the opening pick along the right edge of your phone to release the plastic clips and slice the adhesive.

Leave the opening pick in the top right corner to prevent the adhesive from resealing.

Do not try to separate the phone assembly from the back cover all the way yet, the fingerprint cable is still connected to the motherboard.

Flip your Redmi Note 9 over.

Avoid straining the fingerprint flex cable during the following procedure.

Carefully fold the back cover to the right side of the phone assembly like you would open a book from the back.

Slide the back cover underneath the phone assembly so that the phone assembly overlaps about one third of the back cover and the fingerprint cable is not strained.

Use a Phillips screwdriver to remove the eleven 3.9 mm-long screws securing the motherboard cover.

Insert the tip of an opening pick underneath the bottom left edge of the motherboard cover.

Pry up the motherboard cover.

Remove the motherboard cover.

Use a spudger to disconnect the fingerprint cable by prying the connector straight up from its socket.

Separate the phone assembly from the back cover.

Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.

Use a spudger to disconnect the display cable by prying the connector straight up from its socket.

Use a spudger to disconnect the interconnect cable by prying the connector straight up from its socket.

During the following step do not fold the cable sharply and only bend it to avoid cable damage.

Fold the display and the interconnect flex cable towards the charging port in order to get free access to both battery pull tabs and the battery.

You might want to use a small piece of tape to temporarily stick the cables onto your working surface to avoid accidentally damaging them during the battery removal.

Use a pair of blunt nose [product|IF145-020|tweezers] or your finger to carefully bend the battery cable to the left to get free access to the left battery pull-tab.

The battery is secured to the rear case with two pieces of stretch-release adhesive.

Don't jab the battery with any sharp tools. A punctured battery may leak dangerous chemicals or catch fire.

Use a pair of blunt nose tweezers or a clean fingernail to peel down both battery adhesive pull-tabs to un-stick them from the top edge of the battery.

Grab the first pull-tab with a pair of blunt nose tweezers or your fingers and slowly pull it away from the battery and towards the bottom edge of your phone.

Pull hard enough to maintain tension on the strip, but don't force it. Give it plenty of time to stretch and un-stick from under the battery.

Don't press down on the battery. Hold the phone firmly by its sides.

Keep the strip flat and unwrinkled. Try to pull evenly on the whole strip, rather than pulling mainly in the middle or on one side.

Pull at a low angle so the strip doesn't snag on the edge of the battery.

If the adhesive strip breaks off, try to retrieve it using your fingers or blunt tweezers, and continue pulling—but do not pry under the battery.

If the adhesive breaks off underneath the battery and can't be retrieved, continue with the next step.

Repeat the previous pull-tab removal procedure on the second pull-tab.

Follow the same procedure as with the previous strip: don't press down on the battery, keep the strip flat and unwrinkled, and pull at a low angle.

If the adhesive breaks off underneath the battery and can't be retrieved, apply a few drops of high concentration (over 90%) isopropyl alcohol under the edge of the battery in the area of the broken adhesive strip(s).

Wait about one minute for the alcohol solution to weaken the adhesive.

Use the flat end of a spudger to gently lift the battery.

Don't try to forcefully lever the battery out. If needed, apply a few more drops of alcohol to further weaken the adhesive. Never deform or puncture the battery with your pry tool.

Remove the battery.

Do not reinstall a damaged or deformed battery, as doing so is a potential safety hazard.

If there's any alcohol solution remaining in the phone, carefully wipe it off or allow it to air dry before installing your new battery.

During reassembly, temporarily reconnect the battery to the motherboard to help align it correctly. Disconnect the battery after it is seated.