We eject the sim tray and the micro SD tray. We release these two screws. Furthermore, we remove the back cover. Furthermore, we remove four screws. Now, let's remove the metal bracket. This is the fingerprint sensor connector to continue with the disassembly process.
First, we have to remove the battery flex to loosen the adhesive. We use a contact cleaner or isopropyl alcohol. We remove the battery. Now we remove the screen connector. With the help of a heat gun.
We apply 90 Celsius degrees during 4 minutes. We remove the broken screen at this point is very important to not forget to place the earpiece dust mesh. Now it's time to install the new screen before glue the new screen. You must check if the screen is working properly, we apply industrial adhesive glue depending on the color of the device. Now we return with the ass assembly process, we have finished the ass assembly process.
Source : MovilOne Phone Repair