Root And Unlock Samsung I537 Done with Samsung Tool v.17.9

Same here

Step 1 root your phone.

Step2: *#0808#
DM + ModeM + ADB

Step3: Connect the phone to PC USB port, Selected port, Click Unlock.

Selected model: I537
Selected port: COM219 SAMSUNG Mobile USB Serial Port
Selected port speed: 115200
Searching ADB device...
Please, allow USB debugging on phone...
Please, allow USB debugging on phone... OK
Reading phone info...
Model: SAMSUNG-SGH-I537
Android version: 4.4.2
Product code: SGH2I537ZBMATT
Phone version: I537UCUCNE3
PDA version: I537UCUCNE3
CSC version: I537ATTCNE3
IMEI: 35736505xx5xxxx
Phone S/N: R31D80W8RDX
Checking Super user right... true
Backuping MMCBLK... OK
Checking phone at COM219
Backuping NVM... OK
Writing data to phone... OK
Rebooting phone... OK
Waiting phone... OK
Bypass MSL... OK
Unlocking... OK
Checking phone at COM219
Restoring NVM... OK
Reseting... OK
Unlock done
Done with Samsung Tool v.17.9