Samsung S4 i337 4.4.2 unlock ok step by step

[nhumanh]

1./ Downgrade to 4.3 : Flash MK2 AP part with pit JFLTE_USA_ATT_16G.pit

2./ Root by Saferoot

3./ Install safetrap recovery

4./ Unlock ( New security ) by Z3x

5./ Install stock 4.4.2 zip file - I use I337UCUFNB1_Rooted_Stock_ROM.zip , then I flash stock kernel I337_NB1_Stock_Kernel.tar.md5

All is fine

That is my solution for i337

[rasgula]

No need to do that much work just root 4.4.2 with cfroot (i337m) and use any root app for I337...
Unlock it with z3x.
That's it.
Phone is working without any issue.
Regards

Sent from my SGH-I747M using Tapatalk

[ttn1185]

Originally Posted by rasgula

No need to do that much work just root 4.4.2 with cfroot (i337m) and use any root app for I337...
Unlock it with z3x.
That's it.
Phone is working without any issue.
Regards

Sent from my SGH-I747M using Tapatalk

Please do not give misleading solutions. It's SGH-I337 AT&T version with LOCKED BOOTLOADER.

[rasgula]

Originally Posted by ttn1185

Please do not give misleading solutions. It's SGH-I337 AT&T version with LOCKED BOOTLOADER.

But its worked for me without any issue?

[ahmertelecom]

thnx worked fine form me nb1 unlock and wifi working fine

[richard_lyew]

Originally Posted by rasgula

But its worked for me without any issue?

can anyone test this and f it works? there are alot of i337 4.4.2 out there that need to get unlock

[rockstang]

Originally Posted by richard_lyew

can anyone test this and f it works? there are alot of i337 4.4.2 out there that need to get unlock

I don't buy it. There is no proof, but there is a pay for service.... I wantto unlock my bootloader too, but there is no reason to believe in this when 99.9% of trusted sites agree there isn't a solution at this time.

[..::alexis::..]

Originally Posted by rockstang

I don't buy it. There is no proof, but there is a pay for service.... I wantto unlock my bootloader too, but there is no reason to believe in this when 99.9% of trusted sites agree there isn't a solution at this time.

Unlocking AT&T i337 with 4.4.2 I337UCUFNB1 working good. Tested on a few phones.
1. Connect wi-fi on phone.
2. Settings-Security- Allow untrusted sources. And USB Debugging
3. Go to towelroot.com, download and install it.
4. *#0808#- DM + MODEM + ADB
5. Select phone modem com port(2 ports, for me always work this second one)
6. Read info. Thes select New security and Unlock

Selected model: I337
Selected port: COM8 SAMSUNG Mobile USB Serial Port 
Selected port speed: 115200
Searching ADB device... OK
Reading phone info...
Model: SAMSUNG-SGH-I337
Android version: 4.4.2
Product code: SGH2I337ZWMATT
Phone version: I337UCUFNB1
PDA version: I337UCUFNB1
CSC version: I337ATTFNB1
IMEI: 35656505851xxxx
Phone S/N: R31D809xxxx
Checking Super user right... true
Backuping MMCBLK... OK
Checking phone at COM8
Detected ID: 00000FE6 (SURF9615)
SW Version: M9615A-CEFWTAZM-4.0.17135
Reading ESN... OK
Backuping RFNV... OK
Backuping Feature Mask... OK
Backuping NV Item... OK
Backuping NV Item SIM1... OK
Backuping NV Item SIM2... OK
Backuping Provisioning Item Files... OK
Writing data to phone... OK
Rebooting phone... OK
Waiting phone... OK
Reading phone info...
Model: SAMSUNG-SGH-I337
Android version: 4.4.2
Product code: Not Active
Phone version: I337UCUFNB1
PDA version: I337UCUFNB1
CSC version: Unknown
IMEI: Unknown
Phone S/N: R31D809xxxx
Bypass MSL... OK
Unlocking... OK
Reading QCN file... OK
Checking phone at COM8
Detected ID: 00000FE6 (SURF9615)
SW Version: M9615A-CEFWTAZM-4.0.17135
Checking paths... OK
Restoring EFS Backup... OK
Restoring NV Items... OK
Restoring NV Item SIM1... OK
Restoring NV Item SIM2... OK
Restoring Provisioning Item Files... OK
Reseting... OK
Unlock done
Done with Samsung Tool v.18.2