Introduction
This guide was made in the hopes of being able to help repair Samsung galaxy a12.
Tools
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Unclip flex cables, starting with smaller
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Unwind grounding screw
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Disconnect antenna
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Pop off the main board from Sim tray slot with spudger
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Put flex cable out of the way
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Credit-card size plastic tool
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Wedge between the side of the battery down to the corner and apply isopropyl alcohol
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Tilt camera end up to avoid leaking into battery
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Pry up the battery being careful to not damage it
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Conclusion
To reassemble your device, follow these instructions in reverse order.