How to unlock a disabled iPhone 4?

Ok so my cousin disabled his iphone 4 because he was trying to remember his password. So it says connect to iTunes but iTunes says it can't connect because the iPhone is locked with a pass code. The computer that was use to update the iphone doesn't work anymore so How can i unlock it or erase everything to unlock it? And also the top button ( the lock button) doesn't work it's stuck so please help me!

Try the website that my friend has used it to unlock his iPhone for permanent.
it seems they are official apple unlockers.their price was about $25 and they did a remote unlock by getting the iPhone imei number. They unlocked my friend's iPhone in just 12 hours.

take a look at their website: http://officialappleunlocker.com/

If the power button is stuck your screwed dude sorry

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