The security key that we put on our iPhones, iPods or iPads is fine to prevent anyone from accessing our phones or devices, but sometimes when you forget it's such a nuisance.
Configuration screen lock code TouchVamos iPod explain how you can regain access to the iPhone, iPad or iPod touch without having to reset the entire device.
The only way to regain access to the iPhone, iPad or iPod Touch when you do not remember the key is to recover from the last computer where iTunes is synchronized with the device.
To retrieve the iPhone connects to the computer via the USB cable that comes when you buy it. Run iTunes, if it is not already open, and click on the device name in the left bar of iTunes.
Image of a device connected to iTunes lateralAquí seen on bar will let you see the summary of the iPhone, which will see the Restore option, just below Update in paragraph version.
Restore button in iTunes Store
When you give to Restore will ask if you want to back up your device, you tell her Yes, once finished, you hit restore to reset the iPhone to factory settings (empty completely). Now your iPhone will reboot and load, again ask you to connect to iTunes.
Follow the wizard and select Restore from the last backup or backup. When finished you should have access to your iPhone without problems.
Maybe in doing so some of your apps have performance problems, you have to do is access the AppStore icon on your phone, from the options that appear down the screen and select Refresh all your programs should appear.
You can do the same for music or videos you have purchased by going to iTunes into your iPhone, right down to click on More -> Downloads -> Bought
If you've never synchronized your device with a computer might be interesting to see the solution that we propose in this other article.