what if i don't have a computer to plug my phone into?

You can use either a Mac computer or a Windows computer that has iTunes installed. If you don't have either, see the following from another support article: If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

You need a computer to follow the steps below. If you don't have a computer, borrow one from a friend, or go to an Apple Retail Store or Apple Authorized Service Provider.

You use a PC if it has iTunes installed, a store's display model, or a friend's computer.

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