K770 cid52 can't unlock with 1E team need check this
 

Looking for the NEROkey...OK
Using reader: USB CCID SMART CARD READER 0
Checking for card status...OK
Serial:13xx Free:985 A1:15 A2:85 Other:0 Blocked:NO
Quering key slots...OK
1. KIDP96_EMP_DUMP_R1A - Free, Used:15
2. KIDP96315035 - A2, Used:7
3. KIDP96320035 - A2, Used:1
4. KIDP96321035 - A2, Used:5
5. KIDP96335035 - A2, Used:2
6. KIDP96200133 - A1, Used:1
7. KIDP96201233 - A1, Used:17
8. KIDP96202033 - A1, Used:68
9. KIDP96SUZIR2 - A1, Used:0
Power OFF the phone, connect COM cable and press POWER short
Connected to COM5
Device identification...OK
Sending Preloader...OK
Starting GDFS service...OK
Chip:DB2020 Model:K770i IMEI:35617902-019209-4 CID:52 Domain:RED
OTP LOCKED:1 CID:51 PAF:1
Uploading logic DB2020:
Detecting flash type...OK
ID: 0x897E (Intel)
Chip: Intel Sibley 512 Mbit NOR
Shutting down device...OK
Selected current certificate: A1_DB2020_52_RED
Power OFF the phone, connect COM cable and press POWER short
Connected to COM5
Device identification...OK
Uploading logic DB2020:
Sending ResetLoader...OK
Authenticating with key KIDP96202033...OK
Serial:132F009495A9 Free:985 A1:14 A2:85 Other:0 Blocked:NO
Reseting to factory defaults...OK
Shutting down device...OK
Power OFF the phone, connect COM cable and press POWER short
Connected to COM5
Device identification...OK
Uploading logic DB2020:
Sending ProductionLoader...OK
Writing EROM...OK
Recompiling security area...
GDFS configuration not found in flash! Flashing required to finish recovery process
Using default GDFS configuration for model K770i:
StartAddr:0x00000000 BlockSize:0x0000 PhysBlocks:0 LogBlocks:0
Failed to write SIMLock data, code: 0x0E
Formatting GDFS...OK
Writing GDFS template for selected model: K770...
Error unlocking security: Unable to write GDFS, code: 0x10
STOPPED [18sec]

I try few time alawys the same and only with 1E version this problem.