Restoring iPhone 4 (A1332) using iOS 7.1.2 IPSW File
Restoring iPhone 4 (A1332) using iOS 7.1.2 IPSW File will make your iPhone back to its original state, factory settings as they say. If you forget the passcode, pattern or any thing that makes your iPhone disable, then it would be better if you will restore it.
The only thing that you should have put in mind is to back up your files always, but you can’t because you can’t access your iPhone, either directly or indirectly (iTunes).
Restoring iPhone 4 (A1332) is very difficult if you don’t have a computer and its too pricey to have shop technicians to fix it. They may charge you a couple of dollars – my friend was charge a hefty $75 for his iPhone 4 fix.
If you have a computer and you can access the internet, it is easy for you to make your iPhone restore to its factory settings as you only need an updated iTunes installed in your computer. You can download iTunes here.
After installing iTunes, you need to have the cable which you are going to use to connect your iPhone with your iTunes in your computer. It will ask you to either Update or Restore. Click Update, to download the necessary software
Bear in mind that you need to have the original sim card to help you activate your restored iPhone, else, it cannot be used until it was activated.