Title: False "Cool Down" / Overheating Alert in Cold & AC Environments (iOS 27 / iOS 27.2 Beta)
Device: iPhone 15 Pro (A17 Pro) OS: iOS 27 / iOS 27.2 Beta
Body: I am reporting a persistent software sensor calibration bug specific to the iPhone 15 Pro.
Issue Summary: The device triggers a false "Temperature / Cool Down Required" system alert specifically when moving into cold or air-conditioned (AC) environments, while operating 100% normally in warm ambient room temperatures.
Key Observations & Version Testing:
- Environment Trigger: The thermal alert appears strictly upon cold transitions (micro-condensation/NTC sensor delta drop).
- Hardware Verification: I downgraded to stable iOS 26, and the issue COMPLETELY DISAPPEARED in both hot and cold environments. This confirms the physical NTC thermistors and hardware are fully operational.
- Regression: Updating back to iOS 27 and iOS 27.2 Beta immediately brought the issue back.
It seems the NTC sensor readout logic / thermal governor algorithm in iOS 27 incorrectly registers sudden cold temperature drops as a thermal anomaly.
Please flag this for the thermal QA team for the next iOS update.