if your iPhone after jailbreak and unlock go to emergency mode , you must do the following method:
Method 1: Via Cydia only
1. After jailbreaking, launch Cydia
2. Go to manage/sources, tap edit/add
3. type cydia.pushfix.info/ , add source
4. tap done, browse newly added source Pushfix.info
5. choose Hacktivation Patch (lockdownd), install
6. done, then let enjoy :-)
Method 2:
go to /private/var/root/Library/ and delete orginal lockdown folder and put attached lockdown folder (download lockdown folder here)
restart phone
Let enjoy :-)
