Article: Under the "General" tab, go to Date and Time and change the date to 18th February, 2014. If you don’t do this, then the GBA4iOS will NOT work.  Download version 1.6.2 if you are on iOS 6 or earlier. After downloading the app, you will be asked to open it.
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Go to your iOS device’s settings. Change the Date & Time. Download GBA4iOS from http://gba4iosapp.com/download/  Download version 2.0.1 if you are running iOS 7 on your device. Open the app.