We eject the sim tray and the micro SD tray. We remove two screws. Furthermore, we remove the back cover. Furthermore, we remove two screws. Now, let's remove the metal bracket to continue with the disassembly process. First, we have to remove the battery flex.
Here we have the motherboard flex cable. To loosen the adhesive, we use a contact cleaner or isopropyl alcohol using a plastic tool. Let's remove the battery. Now we return with the assembly process in the description. I leave you the links of the tools and spare parts that we use.
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Source : MovilOne Phone Repair