What should I do if I forgot old iPhone password?

I found my old iPhone that was dead. I charged it and tried to get into it but I forgot the password. This phone doesn't have service because it's my old phone and I can't do anything except type in a password because it was turned off. What should I do?

Put it in DFU mode and restore in iTunes. This will erase everything off of it, though.

Don't think there's anything that could be done. As has been said, you'd have to reset it, clearing it in the process.

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