The X4 Pro 5G packs a 108 MP camera, quite an upgrade over the X3 Pro. The M4 Pro is a 4G version of the M4 Pro 5G from last year.
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POCO X4 Pro 5G Hands-on » YugaTech
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Poco X4 Pro 5G Specifications, Hands-On Images Leak Tips 108-Megapixel Primary Camera