I recently cracked my back cover. I purchased an official looking replacement from Amazon and followed a YouTube disassembly video to replace it. Once I removed the original back cover I found a circuit board/chip stuck to it's inside surface. It has 2 copper connectors that connect with 2 metal pegs just above the aerial on the main motherboard. My new back cover doesn't have this chip, although everything so far appears to be working as normal. Does anyone know what purpose this chip serves?
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