20 - 30 minutos
The phone would randomly shut off at any point of battery charge.
Instructions were clear. Procedure of moderate difficulty the first time you do it as you would expect. Was able to complete the procedure in about 30 minutes. Label the screws as they come out so you can put them back where they belong. Good light and be in no hurry. Replacing the battery fixed the problem.
Be very careful with the camera connection! The camera comes out with the logic board. It should not become disconnected but will if you are the least bit inattentive to it. Especially, be careful when replacing the logic board as the camera wants to disconnect. I used a hair dryer to loosen the battery adhesive as suggested.