Be extremely cautious with your OnePlus 7 Pro's battery: never charge above 25% if you plan to open it, as a short or punctured battery can cause fire/explosion. Always discharge below this threshold before disassembling.
Insert a SIM card ejector tool or an unfolded paperclip into the small hole on the left side of the top edge.
Press gently to avoid damaging the mechanism.
Orient the new SIM card with gold contacts up and notch at bottom right for reinsertion.
Heat the back's edges with a heat gun, using a low setting, for about 1 minute to soften the adhesive.
Be cautious when handling the metal frame as it may become hot to the touch.
Avoid overheating, as this can damage the OLED display, battery, and other internal components.
Apply a suction cup to the lower portion of the phone's backing.
Insert a plastic card or Jimmy tool into the phone's edge and carefully pry the adhesive apart by slicing along the seam.
Remove the phone's back cover.
Remove the black tape covering the laser autofocus and flash flex cable using a pair of tweezers.
Disconnect the laser autofocus and flash flex cable using the flat end of a spudger.
Remove the plastic motherboard cover by unscrewing all fourteen Phillips #000 screws using a Phillips #000 screwdriver.
Use the flat end of a spudger to gently pry up the plastic motherboard cover.
Use the flat end of a spudger to carefully disconnect the power flex cable.
Disconnect the black cable using the flat end of a spudger on the left-hand side.
Use tweezers to carefully pry up the red plastic tab.
Use the flat end of a spudger to disengage the connector under the red plastic tab.
Remove the motherboard mounting screws with a Phillips #000 screwdriver.
Remove two Phillips #000 screws using a Phillips #000 screwdriver.
Remove the camera elevator assembly with a pair of tweezers.
Lift up the large flex cable with your fingers.
Use a pair of tweezers to carefully remove the black plastic screw cover.
Use a Phillips #000 screwdriver to remove two small screws.
Remove the front camera assembly with the flat end of a spudger or your fingers, taking care not to damage any surrounding components.
Remove the Phillips #000 screw in the upper left-hand corner.
Remove the battery.
Grab the black tab with your fingers and pull out the plastic cover.
Use a Phillips #000 screwdriver to remove one screw.
Remove two Phillips #000 screws using a Phillips #000 screwdriver.
Remove the black adhesive strips from the battery compartment using a pair of tweezers.
Remove the three signal cables with your fingers.
Disconnect the USB port flex cable using the flat end of a spudger.
Remove the LED flex cable, CED flex cable, and USB port cable using your fingers.
Disconnect the fingerprint sensor using a pair of tweezers.
Use tweezers to carefully remove the vibration sensor.
Use a flat-end spudger to disconnect the coaxial cable at its bottom-left anchor point.
Remove two Phillips #000 screws from the left-hand side of the phone's frame using a Phillips #000 screwdriver.
Remove the coaxial cable with a flat spudger.
Be careful not to damage the cable.
Locate and remove it from the left-hand side of the battery's area.
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