Can I have ways to avoid the easy installing?

[piero]

@Saunet_AOSP

my CSC is a Stock ROM, from France - Orange

you can change this by first installing a free of carrier CSC according to your country

Portugal → TPH

@piero

you may want to flash first an appropriate Stock Vendor Firmware to your device

installation of the Stock Firmware Samsung

downloads :

For high speed download complete latest firmware, factory tagged “bin” ( 4 files, download filename ends by _FAC ) and update ( without wiping /data, 1file ), use sfirmware

For all archives high speed download update ( 1 file ) latest firmware, use samfw
Also provide interesting COMBINATION FIRMWARE

For all archive firmware, low speed download and sometimes download error, use samfrew

For all archives, paid high speed download use sammobile