Open up your mobile phone and solder on a light sensing resistor to make an alarm go off when the phone is in the light. Possible uses?

Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check our list of supported iPhone and iPad models, then follow our step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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