iFixit

Carefully peel the dock ribbon cable off the logic board and the lower speaker enclosure.

Do not use excessive force to peel the dock ribbon cable off the logic board. Doing so may tear the cable.

Use an iPod opening tool to pry the lower antenna connector up off its socket on the logic board.

Remove the 1.9 mm Phillips screw securing the bottom of the logic board to the inner case.

Remove the following five screws securing the Wi-Fi antenna to to the logic board:

• One 2.3 mm Phillips
• Two 1.6 mm Phillips
• One 1.4 mm Phillips
• One 4.8 mm Phillips

When re-assembling, start off with replacing the 4.8 mm Philips screw first, then the 2.3 mm. This is to ensure there is no mix-up, and avoid rendering the LCD and digitizer useless.

Also make sure to put the long 4.8 mm Philips back in correctly when reassembling. This is the ground for the Wi-Fi antenna and is often the culprit if you are having bad Wi-Fi reception after reassembly.

Use an iPod opening tool to slightly lift the top edge of the Wi-Fi antenna away from the logic board.

Use the tip of a spudger to pull the Wi-Fi retaining clips away from the inner frame.

Remove the Wi-Fi antenna from the iPhone. Make sure you don't lose the metal clips on the top of the cover where the 4.8mm screw attaches or the 4.8mm screw. That's the primary reason for abnormal Wi-Fi performance after the reassembly.

Before reassembly, be sure to clean all metal-to-metal contact points on the connector cover with a de-greaser such as Windex. The oils on your fingers have the potential to cause wireless interference issues. Do not clean the connectors themselves with Windex.

Use an iPod opening tool to carefully lift the rear camera connector up off its socket on the logic board.

Remove the rear camera.

Remove the small circular white sticker (warranty sticker and water indicator) covering the screw near the battery pull tab.

Remove the 2.4 mm Phillips screw that was hidden underneath the sticker.

Use the edge of a plastic opening tool to gently pry the following connectors up and out of their sockets on the logic board:

• Digitizer cable (pry from bottom)
• LCD cable (pry from bottom)
• Headphone jack/volume button cable (pry from top)
• Top Microphone/sleep button cable (pry from top)
• Front camera cable (pry from top)