Ok I'm an idiot, I wasn't in recovery...
$ adb shell
~ # [6ne2fsck /dev/block/platform/msm_sdcc.1/by-name/persist
e2fsck 1.42.9 (28-Dec-2013)
/dev/block/platform/msm_sdcc.1/by-name/persist: clean, 15/1024 files, 1109/4096 blocks
~ # [6nmake_ext4fs /dev/block/platform/msm_sdcc.1/by-name/persist
Creating filesystem with parameters:
Block size: 4096
Blocks per group: 32768
Inodes per group: 1024
Inode size: 256
Journal blocks: 1024
Block groups: 1
Reserved block group size: 7
Created filesystem with 11/1024 inodes and 1102/4096 blocks
But it still not working, I can't access to any network...
Do you think it can be other than a software problem?
I can see networks when I look for them, but no way to register. I try with a SIM of a friend (other provider) and no more success.