El probelma es que no me deja hacerlo, lo intento y :
Shutdown phone use vol- and usb cable to enter fastboot
Press ENTER key to continue...
Wait FASTBOOT connection....
Replace kernel...
target reported max download size of 471859200 bytes
sending 'kernel' (12882 KB)...
OKAY [ 0.353s]
writing 'kernel'...
OKAY [ 0.085s]
finished. total time: 0.441s
Replace recovery...
target reported max download size of 471859200 bytes
sending 'recovery_ramdisk' (25630 KB)...
OKAY [ 0.720s]
writing 'recovery_ramdisk'...
OKAY [ 0.136s]
finished. total time: 0.859s
Unplug usb cable, use vol+ and power key to enter recovery.
Press ENTER key to continue...