Start by heating up the back glass. Ifixit's iOpener kit is very useful here. You can also use heating pad or heat gun

Take off the SIM tray, and start there. Use suction cup if avaliable

After you have made room for plastic card, finish the work by going around the glass with card

Start by screwing off all screws. There are 3 type of different screws.

11 pcs of longer black painted screws

10 pcs of shorter black painted screws

1 shiny metallic screw

After that, pop off bottom piece and then midframe

Remeber to disconnect battery connector first

Battery has pull tabs, so you should try this first

If pull tab breaks, you have to commit a pry of shame

Disconnect volume and power button connector

Disconnect connector on motherboard

Pry off the daughter board

There are 2 screws

1 longer black screw

1 standoff screw

After taking the screws off, you can disconnect antenna coaxial cables

Now you can take motherboard off

Make sure to push SIM-eject pin out first

Charging board is held down with 2 screws

1 black screw

1 golden screw

After taking the screws off, charging board is free

And now you are done, repeat steps backward to put everything back together