Redmi A3 Screen Replacement

Remove the SIM slot so that it doesn't break when you take the phone apart

Heat the edges of the back cover and the area of the camera cover using your heat gun, heating pad, or hair dryer

If using a hair dryer, be careful, because it's obviously quite imprecise

Insert a thin piece of plastic under the back cover and pry it open by dragging the plastic around the edges and carefully under the camera cover

If the adhesive is too tough, heat it up again

Carefully remove the back cover of your phone

If the back cover is glass, it's better to use a suction cup or a piece of duct tape to avoid cracking

Remove the remaining adhesive using adhesive remover or by carefully scraping it off (I forgot to do that initially)

Using a small phillips screwdriver, unscrew the frame of the phone

Be careful not to lose any of the screws

The frame of your phone should come off fairly easily

CAREFUL! You probably know this already, but the lock button is the fingerprint sensor; don't forget to disconnect it.

Disconnect the battery (you can do it with your fingers, I'm just using the screwdriver as a pointer)

This is a bit tricky: the orange sticker on the battery is separated into two parts labelled A (sides) and B (middle). Peel off the sticker and pull on A

Remove the battery with the rest of the sticker. Do not throw the sticker away

There are two spots where the screen is connected, don't forget to unplug both cables

Similarly to the back cover, heat the adhesive and pry the screen off the phone

If your screen is as badly cracked as mine, put duct tape all over it to avoid injury (I didn't do that)

Remove the remaining adhesive from the phone

Carefully apply a small but substantial amount of phone adhesive around the edges of the phone. Make sure not to touch the front camera

Put the new screen on the phone

Connect the screen