How to damage iOS on an iPhone 3GS?

I have a iPhone 3GS running iOS 4.0.3. I want to make it iOS-less. I mean to damage (delete) the iOS permanently. And don't ask why I want to delete it. I'm a tech geek and I love to do experiments that's why I'm doing it.

Jailbreak it and ssh into the phone.

You can also delete the partition and install Android!

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