WARNING: Rooting your phone invalidates your warranty.
Try this at your own risk, I am NOT responsible if you brick your phone.
This guide is for phones with firmware B113 and B115 (may work on others but not tested as far as I'm aware)
TESTADO NO FIRMWARE B219
Step 1 - Download tools here -
b113 b115 root u9200Nixing Tools Only.zip 1.88MB
35 descarregamentos
and extract to your desktop.
Step 2 - Enable USB debugging on your phone - Settings -> Developer options -> USB debugging and plug it into your PC
Step 3 - Run hwadb.exe and let it finish.
Step 4 - Run ubl.exe and wait for it to finish.
Step 5 - Disconnect your phone from your PC and Reboot.
Step 6 - Check to see if Superuser has been installed on your phone.
Step 7 - If you find Superuser in your menu, Congratulations your phone is rooted
CREDITOS VAO PARA Johnny
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