Security Zone vs. GDFS

Hi all,

There were some questions about GDFS and security zone, i'll try to explain shortly.

Security Zone vs. GDFS

Security Zone is a part of GDFS, which contains information about SIM-locks. Our Full Unlockers (TestPoint Full Unlocker, Full Unlocker) modify strictly the security zone, and perform a full and correct rebuild. GDFS Backuper & Restorer allows you to repair all non-security zone GDFS related problems.

GDFS contains much more information, there are a lot of data which are phone specific and cannot be rebuilt 100% correctly (for example Calibration data)

Rebuilding of security zone helps if:

• the phone is able to power on but has all locks locked
• in the cases, when the security zone is damaged, and phone is unable to power on due to this

Symptoms and Solutions

If one of the following symptom appear, try the advised solution.

Symptom: Phone red-blinks when powered on
Reason: Damaged security zone
Solution: Rebuild security zone (see Goals below)

Symptom: Phone works, but all 5 locks closed
Reason: Damaged security zone
Solution: Rebuild security zone (see Goals below)

Goals and Procedures

Goal: Security zone rebuild
Procedure: Use TP Full Unlocker, do not select any GDFS backup file

Goal: Creating phone full GDFS backup
Procedure: Use GDFS Backuper & Restorer, do not select any GDFS backup file

Goal: Restoring GDFS in a phone (a GDFS backup from the phone is available)
Procedure: Use GDFS Backuper & Restorer, select the GDFS backup file

Goal: Reconstructing GDFS in a phone, except security zone (GDFS system is able to start; no GDFS backup available)
Procedure:
1. Take another working phone, use GDFS Backuper & Restorer (without selecting a file) to create a backup
2. Use GDFS Backuper & Restorer, select the GDFS backup file, proceed a restore

Goal: Reconstructing GDFS in a phone + rebuid of the security zone
Procedure:
1. Take another working phone, use GDFS Backuper & Restorer (without selecting a file) and create a backup
2. Use TP Full Unlocker, select the GDFS backup file, proceed an unlock

Regards
Cruiser Team