How to hard reset iphone 4 without passcode or iTunes?

I forgot the password on my iphone 4, so I'm willing to reset it. I looked around the Internet but most have something to do with iTunes, but I don't have access to iTunes. How can I reset my iphone with just the phone and nothing else?

It is impossible to recover your iPhone without iTunes.
Downloading iTunes is free and should be available in your country.
Using iTunes is the best method to restore your phone

You can hard reset your iPhone 4 without using iTunes or pass code. Follow these steps: 1. Press and hold the home button + Sleep/Wake button keep holding the two buttons until your iPhone turns off and restart. 2. When your see the Silver apple logo on your iPhone 4, release the two buttons. 4. Then wait until the apple logo disappears. 5. You iPhone will automatically reset without any options. 6. Then you're iPhone will reboot itself, and then you're done. Note: This process will delete all saved files and data on your iPhone, so make sure that you backup first the important files and data to your computer.