To start we need to have the right tools to proceed with the teardown which you can find in the description first take out the sim tray followed by the battery car removal
To remove the back cover it needs to heat gently around the rear cover edges until the pasted adhesive becomes soft then to pull out the back cover or create an opening we have a back core removal tool using this tool you can pull up the back cover and any attached flex cables without damaging or reshaping it the machine is minimizing the pulling pressure
Once you feel the opening is enough to insert a plastic carpet tool or something similar to cut the adhesive around the back cover take out the back cover and undo 15 screws on the rear car frame audio
Using a plastic car pry tool creates an opening to separate the backcourt frame be careful and work around edges to separate the plastic clips
Once you take out the frame speaker buzzer can be found in the frame apply a little heat and take it out with a tweezer
disconnect the battery connector and both ends on the main flex cable which connects the LCD as well audio jungle unplug the antenna and undo the screw to take out the main board
Now we can disconnect the front camera and rear camera a quick note it is not required to take off the main board to replace the front camera there are four rear cameras on a31 besides the macro camera the other three camera connectors are plugged into the back side of the main board
Disconnect all and give a slight force to take out the camera module meantime disconnect the macro camera on the front side of the board
Now on the top of the LCD frame by using a tweezer take out the AP speaker how do you jump and again using a tweezer or something similar to pull up the vibrator motor near the battery
on the bottom PCB board first unplug the fingerprint sensor connector then undo one more screw to take out the board so
let’s move to the battery now Samsung phones don’t have any tab to pull the adhesive strips let’s apply the heat on the battery and create an opening using a plastic car pry tool insert it once you have some space use a pry tool to lift the battery
Now we can take out the battery and the last part will be the LCD removal or replacement nowadays Samsung genuine screens come with the frame and most of the aftermarket screens are coming with the frame which will make the LCD replacement much easier and faster hope you have enjoyed the teardown guide for repairs let us know if you have any questions