Remove all visible screws securing the housing above the battery

Insert a pick or a spudger by the silver slot on the left. Along the phone's edge, gently pry up until the housing is released.

This should easily release. If not, check to make sure all screws have been removed (check under stickers)

Disconnect the battery from the phone by lifting the battery connector from the phone with a spudger.

Do not use a metal tool to disconnect the battery to avoid shorting it.

Using a spudger, disconnect the screen by carefully lifting the screen connector.