Locked iPhone
I don’t have a computer right now so I’m just wondering if there’s another way to unlock the phone
iPhone 13 Mini
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How to reset your passcode without a computer if you have iOS 15.2 or higher -
How to reset your iPhone, iPad, or iPod touch when you forgot your passcode - Apple Support
You could also ask a friend who has a computer if you can use theirs or go to an Apple store, they can help you out.