Originally Posted by avo2k
My Asus TF300T is unlocked (because a "This device is unlocked" message appears when i turn on the device), it has root access, but no custom recoveries installed. My device is on ICS 4.0.3. Build number ( IML74.US_epad-220.127.116.11-20120604), Kernel version (18.104.22.168-00003-gafee6c5).
Can someone give me step by step instructions on how to upgrade my device to JB 4.2.1 with ASUS stock bootbloader10.6.2x and TWRP patched 22.214.171.124 ?
Here is a link to the best tutorial I have ever found for upgrading the TF300T. Though written for upgrading to JB 4.2.1, it works for any version, you just have to substitute the appropriate files.
Read through it VERY CAREFULLY and don't proceed until you are completely familiar with the steps you need to follow for your particular situation.
If you have questions, ASK. Don't go forward not knowing for sure what to do and wind up bricking your tablet.
Let me know if I can help in any way.