Acabei de descobrir essa ferramenta, nao sei se funciona, mas vale o teste. Segundo diz é pra qualquer aparelho e qualquer versão.
"ROOTx Root FOR EVERY ANDROID
Have you ever had a China tablet or a tablet which has not been Devoloped in XDA ?? Do you want a safe and easy way to do all this ??
WELL YOU HAVE COME TO THE RIGHT PLACE !!
The new ROOTx App can root any android at no cost or any installation of new roms !!
A very Good app for Sony Experia user who love there UI but dont want to change it but use ROOT
Try it now !!!"
forum. xda - developers.com / showthread.php?t = 2239958