What happens if you don't turn on your phone for a year?

If you don't turn on your phone for a year, it will likely remain powered off, and the battery may gradually discharge, potentially leading to a deep discharge state that could damage the battery. Software updates and app data might become outdated or corrupted, and you may lose unsaved information if the phone is not backed up. Additionally, if the device has a SIM card, you may lose your phone number or service associated with it, depending on your carrier's policies.