i need help solving i9300

[boxuser]

Selected model: I9300

Selected port: COM119 Z3X BOX Serial Port
Selected port speed: 115200
Waiting ADB device... OK
Reading phone info...
Model: GT-I9300
Android version: 4.1.2
Product code: GT-I9300GRDSTH
Phone version: I9300DXEMB1
PDA version: I9300XXEMF6
CSC version: I9300OLBEMF3
IMEI: 004999010640000
Phone S/N: RV1C84XAPST
Checking Super user right... false
Rooting phone, please wait... error (0300-103-104-1)
Done with Samsung Tool v.17.9

[HasanaliMomin]

Root Samsung Galaxy S3 GT-I9300

Step 1. First of all, Download the rooting exploit for Galaxy S3, CF-Auto-Root-m0-m0xx-gti9300.zip.

Step 2. Extract it on your desktop and you’ll get Odin and tar.md5 file.

Step 3. Run Odin3-v1.85.exe on your PC.

Step 4. Reboot your phone into Download Mode:

- Switch Off your phone

- Press and Hold the Volume Down + Home + Power buttons together for a few seconds and release it when you see warning message on your screen.

- After that just hit the Volume Up key and you’re done.

Step 5. While in download mode, Via the USB Cable connect your phone to PC and make sure Odin has recognized your device, the ID:COM port will either turn yellow or blue and you’ll also notice Added!! in the message section.

Step 6. Next, Hit the PDA Button and select the CF-Auto-Root-m0-m0xx-gti9300.tar.md5, file and Click on the START button to start flashing the root exploit.

Step 7. Wait for a few seconds and Odin will notify via the PASS!! message and your phone will automatically reboots.

Step 8. When your phone reboots, just check that SuperSU App has been installed and to verify root access, install the ‘Root Checker‘ App from Google Play Store.

You’ve now successfully Rooted your Galaxy S3 GT-I9300 Using CF-Root package and you can start using Apps which requires root access, However if you’re interested in to Flash Custom ROMs, You’ll first need to install Custom Recovery, i.e. CWM or TWRP. Follow further instructions below.

[koneb]

you have to root first before unlock

[krisu0007]

u can use kingo root.

fast and easy- no need to flash phone