iphone 3,4,5,6 Passcode Unlock

Hello Friends,
Today i'm going to tell you how to unlock  passcode to your iphone...

first you need to install itunes ..in your laptop and pc..latest one
 if you don't have itune ..

click here to download it.. http://www.apple.com/in/itunes/download/

after download and installation this software ..

you need to switch off your iphone.

After then Open itune.
in your iphone press home key botton..and insert you usb cable..
don't loss home key ..until you show DFU MODE..
thats mean RECVERY MODE..
when you connected on itune..on recovery mode...
you see like as i give you this  picture...
afterthen  just click on  RESTORED IPHONE..
then its downloading firmware for your iphone ..when its downloaded file.. update you iphone
...........your passcode is unlock 1000000000%...