problemi nexus 7 3g

[campagio85]

Salve ho un nexus 7 32gb 3g versione 2012, penso di averlo briakkato nel passaggio ad android kitkat, il dispositivo è sbloccato si accende da solo in modalita fast boot e basta ho provato con il nexus root tool kit pero quando vado flash stock selezionado soft-brick parte tutta la procedura ma non va a buon fine dandomi questo errore


sending 'bootloader' (2096 KB)...
OKAY [ 0.317s]
writing 'bootloader'...
OKAY [ 1.235s]
finished. total time: 1.553s
rebooting into bootloader...
OKAY [ 0.019s]
finished. total time: 0.021s

sending 'radio' (16384 KB)...
OKAY [ 2.142s]
writing 'radio'...
FAILED (remote: (BadParameter))
finished. total time: 2.166s
rebooting into bootloader...
OKAY [ 0.027s]
finished. total time: 0.033s

archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
archive does not contain 'system.sig'
--------------------------------------------
Bootloader Version...: 4.18
Baseband Version.....: N/A
Serial Number........: 015d456da6081005
--------------------------------------------
checking product...
OKAY [ 0.024s]
checking version-bootloader...
OKAY [ 0.020s]
checking version-baseband...
FAILED

Device version-baseband is 'N/A'.
Update requires '1231_0.17.0_1205'.

cosa devo fare grazie

[Galaxyasceplus]

prova da fastboot

[campagio85]

prova da fastboot

ho provato per il risulato non cambia

D:\sdk\sdk\platform-tools>fastboot flash bootloader bo
sending 'bootloader' (2096 KB)...
OKAY [ 0.290s]
writing 'bootloader'...
OKAY [ 1.295s]
finished. total time: 1.585s

D:\sdk\sdk\platform-tools>fastboot reboot-bootloader
rebooting into bootloader...
OKAY [ 0.020s]
finished. total time: 0.020s

D:\sdk\sdk\platform-tools>fastboot -w update image.zip
archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
archive does not contain 'system.sig'
--------------------------------------------
Bootloader Version...: 4.18
Baseband Version.....: N/A
Serial Number........: 015d456da6081005
--------------------------------------------
checking product...
OKAY [ 0.030s]
checking version-bootloader...
OKAY [ 0.020s]
checking version-baseband...
FAILED

Device version-baseband is 'N/A'.
Update requires '1231_0.17.0_1205'.

finished. total time: 0.203s

lo porto in garanzia?