Twin GPL violation Neuf Telecom

[Maël Lavault]

Hi,

I'm a French Twin GW2 (the GW1, GW3(linux 2.6.18 kernel) and tact(2.4
kernel) version is concerned too) user (A Linux Kernel 2.6.10, Busybox,
libblkid and Qtopia based phone) and i will to be able to modify the
firmware. But Neuf Cegetel (the seller of this phone) don't give the
source code.

All versions of the firmware (compressed in sqashfs 3.0 file) :
http://gw1download.neufbox.neuf.fr/

The Twin :
http://offres.neuf.fr/mobile/nos-mobiles/twin_classic.html
http://www.wneweb.com/mobile/more/gw1.htm
http://www.linuxdevices.com/news/NS9996556326.html
http://www.linuxdevices.com/news/NS8358183983.html
http://www.linuxdevices.com/news/NS3547076080.html
http://www.linuxdevices.com/news/NS7480209721.html

What must i do ?
Thanks.