Introduction
This is not a pleasant repair. The device is full of adhesive. Removing the display assembly from front panel (or "mid chassis") can easily result in the destruction of the front panel bezel and digitizer. I suggest that you replace the entire digitizer, rather than one portion. If you want a beautiful front panel bezel, you will definitely need to replace that part, as well.
Tools
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Remove battery cover using a plastic opening tool or finger nail.
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Slide opening tool to release clasps and remove battery cover.
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Remove Micro SD card by pushing it in to the phone. Spring-loaded clasp will release the card.
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Use a curved metal spudger to remove GPS cover.
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Probe underside of GPS cover until you can force a small opening between GPS cover and back cover of phone.
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Insert plastic opening tool into gap between GPS cover and back cover of phone. Slide tool along GPS cover and pry the piece off.
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Remove speaker.
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This rubber spacer is held on by a weak adhesive. Be careful with this during reassembly, as it may catch and crumple as you put the back panel back the phone.
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Pry off Bluetooth coaxial cable connector.
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Unwind Bluetooth coaxial cable from plastic camera shield.
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Gently separate upper logic board from mid chassis. The upper logic board is held to the mid chassis by copious amounts of strong adhesive.
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Gently separate lower logic board from mid chassis. The lower logic board is held to the mid chassis by copious amounts of strong adhesive.
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Once the adhesive-laden logic boards are separated from the mid chassis, the entire assembly easily comes off.
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Blast the front panel with heat and pry between the display assembly and front panel bezel, working one or several guitar picks around the display assembly.
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Once the display assembly is loosened from the front panel, it will fall away.
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The front glass came off easily, but the digitizer was much more difficult to remove. The adhesive holding together the display assembly is much weaker than the adhesive holding the display assembly to the front panel.
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To reassemble your device, follow these instructions in reverse order.