Before you begin, discharge your iPhone battery below 25%. A charged lithium-ion battery can catch fire and/or explode if accidentally punctured.

Power off your iPhone before beginning disassembly.

Remove the two 6.7 mm-long pentalobe screws at the bottom edge of the iPhone.

Opening the iPhone will compromise its waterproof seals. Have replacement seals ready before you proceed past this step, or take care to avoid liquid exposure if you reassemble your iPhone without replacing the seals.

There's a black rubber gasket just beneath the head on each pentalobe screw. For maximum protection against dust and liquid, check the condition of the gaskets or replace the screws during reassembly.