1. Silahkan restore dulu ke iOS paling baru (8.4)
2. Download TaiG Jailbreak Tool disini http://www.taig.com/en/
3. - Matikan Passcode (Settings > Passcode)
- Find My iPhone (iCloud > Find My iPhone)
4. Jalankan TaiG Jailbreak Tool kemudian hilangkan centang 3K Assistant
5. Pilih Start dan tunggu hingga proses jailbreak iOS 8.4 Selesai