Q: how do i unlock my i phone 4 when its disabled

Locked Out, Forgot Lock or Restrictions Passcode, or Need to Restore Your Device: Several Alternative Solutions

1. iOS- Forgotten passcode or device disabled after entering wrong passcode

2. iPhone, iPad, iPod touch: Wrong passcode results in red disabled screen

3. Restoring iPod touch after forgotten passcode

4. What to Do If You've Forgotten Your iPhone's Passcode

5. iOS- Understanding passcodes

6. iTunes 10 for Mac- Update and restore software on iPod, iPhone, or iPad

Forgotten Restrictions Passcode Help

You will need to restore your device as New to remove a Restrictions passcode. Go through the normal process to restore your device, but when you see the options to restore as New or from a backup, be sure to choose New.

Also, see iTunes- Restoring iOS software.

See Here  >  http://support.apple.com/kb/HT1808

You may need to try this More than Once...  Be sure to Follow ALL the Steps...

After you have Recovered your Device...

Re-Sync your Content or Restore from the most recent Backup...

Restore from Backup  >  http://support.apple.com/kb/ht1766