Update not work
I’m not able to download the new iOS 15 on my iPhone 12 mini
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What happens when you try?
Can you post a screenshot of the whole screen, it could reveal why you aren't able to update.
Make sure you:
• Are using a WiFi connection (not a hotspot).
• You have an active cell signal. You need both WiFi and cell to perform the upgrade.
• Have your battery charged at least 50%. Better yet, keep it plugged in during the update.
• Are not using a VPN connection.
• Do not have power save mode turned on.
• Do not have a beta version installed.
• You have at least 6 gigs of storage available.
You can also check out this article for help -
If your iPhone, iPad or iPod touch won’t update
https://support.apple.com/en-gb/HT201435