How can I reset my iPhone password without a computer
I forgot my password on my iPhone but have a iPad I am using
iPhone 11 Pro Max, iOS 14
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See the following from If you forgot your iPhone passcode - Apple Support
This process requires a Mac or PC. If you're using a PC, make sure that is has Windows 8 or later, and that iTunes is installed. You also need the cable that came with your iPhone, or another compatible cable, to connect your iPhone to the computer.
If you don't have a computer and you can't borrow one, you need to go to an Apple Retail Store or Apple Authorized Service Provider for help.