Apple iPhone 4S – How to replace the camra of Apple iPhone 4S

Before disassembling your iPhone, be sure it is powered off. Remove the two 3.6 mm Pentalobe P2 screws next to the dock connector. During reassembly, we recommend you replace the 5-point screws with equivalent Phillips screws.

Push the rear panel toward the top edge of the iPhone. The panel will move about 2 mm.

Pull the rear panel away from the back of the iPhone, being careful not to damage the plastic clips attached to the rear panel.

Remove the rear panel from the iPhone.
Remove the following screws securing the battery connector to the logic board:

One 1.7 mm Phillips screw
One 1.5 mm Phillips screw. Use a plastic opening tool to gently detach the battery connector from the socket on the device. Start lifting off the connector from the bottom side, by placing the tip of the tool between the loudspeaker enclosure and the metal cover of the connector.
The battery connector comes off vertically from the logic board. Do not apply force sideways.
Pay attention to the pressure contact underneath the top screw of the battery connector. This may come loose while prying the battery connector from its socket.

Use a plastic opening tool to pull the pressure contact from underneath the battery connector.

When reinstalling the pressure contact, be sure to clean it with a degreaser such as windex or isopropyl alcohol. The oils on your fingers have the potential to create wireless interference.
Take notice of the position of the small black ground clip on the upper screw of the battery connector. This clip is attached only by the upper screw. When reinstalling, it must be aligned so the gold contact point will press against the back cover.
Be careful not to rip off the battery connector socket soldered on the logic board. There are 4 very small soldering points awaiting this mistake!

Insert the edge of a plastic opening tool between the battery and the outer case near the bottom of the iPhone. Run the plastic opening tool along the right edge of the battery and pry up at several points to completely separate it from the adhesive securing it to the outer case.

Use the exposed clear plastic pull tab to peel the battery off the adhesive securing it to the iPhone. Remove the battery.

Be careful not to pull the plastic pull tab too hard as it can be ripped off very easily.

 Be wary of the outer plastic ring located on top of the rear camera's flash assembly. It can be easily displaced if not removed during disassembly. You can use tweezers, a plastic opening tool, or a spudger to remove the outer plastic ring.

Remove the following four screws securing the cable cover to the logic board:

One 2.7 mm Phillips screw
One 2.6 mm Phillips screw
One 1.3 mm Phillips screw
One 1.2 mm Phillips screw

Use the edge of a plastic opening tool to pry the cable cover tabs out of their slots cut into the EMI shield on the logic board. Lift the cable cover from its edge nearest the top and remove it from the iPhone.

Use the edge of a plastic opening tool to pry the rear camera connector up from its socket on the logic board.

Be careful not to break any components off the surrounding area on the logic board as you pry upwards.
Remove the rear camera from the iPhone. There is a small rubber gasket that sits underneath the rear-facing camera. Make sure that it is properly seated before reassembly