I belong to those who cannot unlock the TF300T bootloader (in my case probably because I sent it once to Asus Repair Center and after getting back the serial number was removed from the device). I've tried to unlock plenty of times with the Asus Unlock Tool -- without any result.
I can root the device and I can flash any factory ROM, downloaded from Asus website -- but I cannot flash any custom ROM. It would be essential since the official ROM (any of them) becomes laggy and slow very soon after flashing and I am tired of flashing and re-doing the setup process every month or so.
The Service Center certainly does not recognise its responsibility and does not want to help.
To tell the truth I could not follow day-by-day the TF300T threads of the Forum, so let me ask: Is there any new method to unlock? Or without unlock is it possible to flash a smoother and quicker custom ROM to my device?
Thanks in advance for the answers!