hi dear friend pavel
ok everything fine, rooted with vroot and already backed up nvram files
then I flashed the patched secro (I mean the signed unlocked one) taken it from B113.... there is not a patched signed secro for B119 but having a look at the firmware is similar... flash done without issue....
then I have tried to flash the B256 firmware via splash too but I'm facing an error.... strange.... it's a security error.... I'm afraid this B119 has a secured bootloader.....
will make some other tries, but I'm sure to have followed the usual right process for moving from U10 to T00...
any idea is welcome pavel
thanks
EDIT: flash completed successfully.......it's now running the B256SP01, IMEI restored without problem.....
thanks Pavel and other users for support.
In case someone want the G750-U10 V100R001C00B119CUSTC432D001 I can provide it.
Cheers