Originally Posted by NycoFR
Hi, this looks like either an APN missconfiguration or a disabled module in the ROM. I al sorry not to actively develop this ROM anymore ; so the only advice I can give is to try to reconfigure your APN (should be in network -> other options) or to flash my own ROM which is entirely based on the official firmware (ROM stock Samsung XXLH3 (CSC OXALH4, Modem XXLH2) (Gingerbread)) that should work in Spain.
Thanks so much for your quick response. I have flashed the ROM you mentioned and the version was reverted to the original and indeed now I can turn on/off roaming data, so the problem is solved. I preferred the Jelly Bean, but I undersand that because the stuff you did is not official it can have some misconfigurations.
But good work Nyco I hope you carry on projects like this
Have a good day,