You can thank the EU and their STUPID, brittle, RoHS lead-free solder they foisted on the entire planet!Just keeps getting better and better.![]()
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Any that come in a large, BGA package. It's not Apple's fault. It's the EU's.What is this component - the modem? antenna? SIM reader?
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It's the lead-free solder that the EU FORCED upon the entire world! Seriously.Not hard to imagine a few possible scenarios.
Apple could manufacture logic boards in a large batch at one time, and then use up that supply of logic boards over the course of a year.
Or the component supplier could have had an issue where 1 in 100 chips were faulty, but they didn't realize this until much later so those defective chips ended up in phones produced over an entire year.
Apple might source this part from several companies and found that one of them had issues with reliability.
When Apple makes the logic boards they have multiple assembly lines. They could have discovered a flaw in the soldering on only one line and just recently discovered it. So every iPhone made on this line could be defective, but if they have 200 lines then it's still 1 in 200 devices.