The only requirement: Before the installation, the system date must be set to Februor earlier. ipa file that is accepted by means of in-house distribution via an expired certificate. Since Apple would never allow such a gimmick, the installation is carried out via the Safari browser. As of today, there is a new emulator for iPhone, iPad and iPod touch: The so-called GBA4iOS 2.0 emulates Game Boy Advance on the iOS device.