1. Bukak cydia
2. Uninstall cydia substrate
3. Restart springboard
4. Off device & on kan semula
5. Bukak cydia
6. Search cydia substrate & install
7. Restart springboard
8. Off device & on kan semula
Sekiranya berjaya boot masuk lock screen masalah boot loop selesai.
***sila pastikan tweak yg akan diinstall dr cydia compatible dgn ios 9
Refer this link
http://www.ijailbreak.com/cydia/list-jailbreak-tweaks-compatible-ios-9/
source via iOS user group | telegram
 on iOS 9 jailbroken device){kind=link}