15 minuten - 1 uur
My battery was running low very fast. I had to recharge twice, sometimes 3 times a day. And the most annoying thing was the phone dying with 20% or even more.
Almost perfect. The hardest parts involve the screen. Taking off the screen is a strugle. You have to be very careful to not damage the screen and the flat cables. Also taking off the old battery is a bit hard because is very well glued to the board. You have to be watchful at this part . Put force only at the parts indicated on the guide. Reassembling the screen cables also takes time, you just need to be cautious and certify that everything is firm attached and correct.
i'm already using the phone and everything is working as charm. The battery is lasting at least twice more than the old one. Didn't have any issues so far.
Taking off the screen is the part you need to pay most attention. Do not try to take it off by force or at once. Be patient. Same thing with the battery. Pay close attention to the guide, thus you won't harm the cables and the board. And test the phone before closing everything, then you gonna save time.