If you are on .21 firmware it is not so easy to root.
1. you have to downgrade to .15 (see here). Beware this is not without risk please read the instructions very carefully.
2. root (see here) and protect the root status with 'OTA rootkeeper'.
3. update via OTA to .21 and restore root with OTA Rootkeeper.
|apps, asus, stock, transformerprime, uninstall|
|Thread Tools||Search this Thread|