Part 3/9:
Next came the vital logic board. An operational unit was essential, as a dead or locked one couldn't serve the purpose. The logic board's specific configuration required activating Face ID functionality, crucial for the modern iPhone experience. The process of finding the cheapest parts quickly turned into a labor-intensive venture, as simply sorting by price on platforms like AliExpress often led to false positives—cheaper listings that had little to do with the actual product one was seeking.