When we remove the any IC like CPU EMMC from the motherboard. There is a lot of dirt on both IC and PCB pads. To install a new IC first we need to remove this all dirt and clean the pads. Removing black glue or white glue solder and flux is a technical process. If we do not have proper knowledge and hands skill we can easily destroy the PCB or IC. Mostly IC pads removed as result the mobile phone dead because some connection from the board is remove. And the second mistake that we do is the remo

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