Replace the front panel assembly with this guide.
Careful not to break any clips along the perimeter.
Use a plastic opening tool to slide along the top edge of the rear case.
Move the plastic opening tool around the top left corner, prying up along the rear case.
Use a pry tool to pry along the top right edge of the device.
Remove the rear case by lifting it off the phone.
Use your finger or a plastic opening tool to pry the battery.
Disconnect and remove the battery.
Use your fingernail to push the SIM card deeper into its slot.
For reassembly, risk of damaging the card if forced too hard.
Slide the SIM card partially out with your thumb.
Remove the 10 x 4.0 mm Phillips screws from the midframe.
Hold the plastic midframe on the left side with your thumb and forefinger.
Lift it gently, using very little force to release its snap-fit connection.
Careful: avoid damaging the motherboard.
Insert a plastic opening tool outboard of the speaker portion of the headphone jack/speaker assembly.
Remove the headphone jack/speaker assembly from the Galaxy S III.
Disconnect the front-facing camera connector using a plastic opening tool.
Do not attempt to remove the front-facing camera at this time as its cable remains routed beneath the motherboard assembly.
Disconnect the digitizer cable by carefully lifting its connector away from the motherboard.
Disconnect the display data cable from the motherboard.
Disconnect the Wi-Fi antenna cable by prying its connector upwards.
Remove the 3.0 mm Phillips screw securing the motherboard to the front panel assembly.
Careful to avoid damaging cables or components.
Remove the 2.0 mm Phillips screw holding the front-facing camera bracket to the front panel.
Use a pair of tweezers to carefully lift the front-facing camera, ambient light sensor, and rear microphone assembly from its socket in the front panel assembly.
Peel the antenna cable away from its channel.
Leave the cable attached to the antenna board, as complete removal is not necessary.
Insert the spudger tip under the earpiece speaker and gently pry it out.
Peel the ribbon cable away from the front panel assembly using the flat edge of a spudger.
Wedge the flat edge of a spudger under the ambient light sensor.
Locate the earpiece/volume buttons/ambient light sensor ribbon cable connector.
Insert the plastic opening tool into the gap between the earpiece/buttons/ambient light sensor ribbon cable.
Remove the earpiece/buttons/ambient light sensor ribbon cable by grasping it firmly and pulling it out of the phone.
Release the power button from its recess.
Be careful not to damage the surrounding components.
Use the tip of a spudger to carefully dislodge the vibrator from its housing on the front panel assembly.
Peel the vibrator assembly off the front panel assembly using the tip of a spudger.
Remove the vibrator from the front panel assembly.
When installing a new front panel assembly, ensure to transfer all components from the old assembly.
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