Introduction
If your handset is encountering difficulties, replacing the motherboard may resolve it. Use the anti-static wrist strap as a precautionary measure to prevent damage to the motherboard.
Tools
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Find the bump where the battery cover meets the phone. Put your thumb here, and push and slide the cover down.
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Unplug the battery by squeezing your hands on the small white plug and lifting it up.
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The battery is now detached and ready to be removed by lifting it out.
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Conclusion
To reassemble your device, follow these instructions in reverse order.