How to open up iPhone 3G/3GS + Battery Drain [GUIDE]

Step 1
Begin by removing the sim tray, using the included sim card removal tool (or a paperclip if you've lost the tool.). the picture is below:

Step 2

Holding your device on end you will notice two small screws on either side of the dock. These screws must be removed in order to open the case.

Step 3
Insert a small thin tool between the chrome ring and front panel glass directly above one of the screw holes. You will need to exert a small amount of pressure to seperate the display from the back panel

Step 4
Lift the panel up from the dock end being careful not to tear or break any ribbons connected near the other end.

Step 5
Unplug ribbons 1 and 2 by lifting them from the main board. Under ribbon 2 you will need to find and unclip ribbon 3, then carefully remove the display assembly.

Step 6Remove the seven screws circled in red. Note: One screw is located under the DO NOT REMOVE sticker :)

Step 7
Unplug ribbon 4.

Step 8
Lift the mother board out taking note of the camera which is still connected to the underside of the board. You will need to unplug the ribbon circled in red.

Step 9
Place the mother board to the side.

Step 10
Use the attached tab to pull up on the battery, there is a mild adhesive on the back side, so it will take a bit of force.